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Chemical Structure| 1643-16-9 Chemical Structure| 1643-16-9

Structure of 1643-16-9

Chemical Structure| 1643-16-9

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Product Details of [ 1643-16-9 ]

CAS No. :1643-16-9
Formula : C11H14O3
M.W : 194.23
SMILES Code : CC(C)C1=CC=C(OCC(O)=O)C=C1
MDL No. :MFCD00014364
InChI Key :FPVCSFOUVDLTDG-UHFFFAOYSA-N
Pubchem ID :137131

Safety of [ 1643-16-9 ]

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H315-H319-H335
Precautionary Statements:P261-P305+P351+P338

Computational Chemistry of [ 1643-16-9 ] Show Less

Physicochemical Properties

Num. heavy atoms 14
Num. arom. heavy atoms 6
Fraction Csp3 0.36
Num. rotatable bonds 4
Num. H-bond acceptors 3.0
Num. H-bond donors 1.0
Molar Refractivity 54.09
TPSA ?

Topological Polar Surface Area: Calculated from
Ertl P. et al. 2000 J. Med. Chem.

46.53 Ų

Lipophilicity

Log Po/w (iLOGP)?

iLOGP: in-house physics-based method implemented from
Daina A et al. 2014 J. Chem. Inf. Model.

1.93
Log Po/w (XLOGP3)?

XLOGP3: Atomistic and knowledge-based method calculated by
XLOGP program, version 3.2.2, courtesy of CCBG, Shanghai Institute of Organic Chemistry

2.69
Log Po/w (WLOGP)?

WLOGP: Atomistic method implemented from
Wildman SA and Crippen GM. 1999 J. Chem. Inf. Model.

2.27
Log Po/w (MLOGP)?

MLOGP: Topological method implemented from
Moriguchi I. et al. 1992 Chem. Pharm. Bull.
Moriguchi I. et al. 1994 Chem. Pharm. Bull.
Lipinski PA. et al. 2001 Adv. Drug. Deliv. Rev.

1.96
Log Po/w (SILICOS-IT)?

SILICOS-IT: Hybrid fragmental/topological method calculated by
FILTER-IT program, version 1.0.2, courtesy of SILICOS-IT, http://www.silicos-it.com

2.11
Consensus Log Po/w?

Consensus Log Po/w: Average of all five predictions

2.19

Water Solubility

Log S (ESOL):?

ESOL: Topological method implemented from
Delaney JS. 2004 J. Chem. Inf. Model.

-2.79
Solubility 0.314 mg/ml ; 0.00161 mol/l
Class?

Solubility class: Log S scale
Insoluble < -10 < Poorly < -6 < Moderately < -4 < Soluble < -2 Very < 0 < Highly

Soluble
Log S (Ali)?

Ali: Topological method implemented from
Ali J. et al. 2012 J. Chem. Inf. Model.

-3.32
Solubility 0.093 mg/ml ; 0.000479 mol/l
Class?

Solubility class: Log S scale
Insoluble < -10 < Poorly < -6 < Moderately < -4 < Soluble < -2 Very < 0 < Highly

Soluble
Log S (SILICOS-IT)?

SILICOS-IT: Fragmental method calculated by
FILTER-IT program, version 1.0.2, courtesy of SILICOS-IT, http://www.silicos-it.com

-2.74
Solubility 0.351 mg/ml ; 0.00181 mol/l
Class?

Solubility class: Log S scale
Insoluble < -10 < Poorly < -6 < Moderately < -4 < Soluble < -2 Very < 0 < Highly

Soluble

Pharmacokinetics

GI absorption?

Gatrointestinal absorption: according to the white of the BOILED-Egg

High
BBB permeant?

BBB permeation: according to the yolk of the BOILED-Egg

Yes
P-gp substrate?

P-glycoprotein substrate: SVM model built on 1033 molecules (training set)
and tested on 415 molecules (test set)
10-fold CV: ACC=0.72 / AUC=0.77
External: ACC=0.88 / AUC=0.94

No
CYP1A2 inhibitor?

Cytochrome P450 1A2 inhibitor: SVM model built on 9145 molecules (training set)
and tested on 3000 molecules (test set)
10-fold CV: ACC=0.83 / AUC=0.90
External: ACC=0.84 / AUC=0.91

No
CYP2C19 inhibitor?

Cytochrome P450 2C19 inhibitor: SVM model built on 9272 molecules (training set)
and tested on 3000 molecules (test set)
10-fold CV: ACC=0.80 / AUC=0.86
External: ACC=0.80 / AUC=0.87

No
CYP2C9 inhibitor?

Cytochrome P450 2C9 inhibitor: SVM model built on 5940 molecules (training set)
and tested on 2075 molecules (test set)
10-fold CV: ACC=0.78 / AUC=0.85
External: ACC=0.71 / AUC=0.81

No
CYP2D6 inhibitor?

Cytochrome P450 2D6 inhibitor: SVM model built on 3664 molecules (training set)
and tested on 1068 molecules (test set)
10-fold CV: ACC=0.79 / AUC=0.85
External: ACC=0.81 / AUC=0.87

No
CYP3A4 inhibitor?

Cytochrome P450 3A4 inhibitor: SVM model built on 7518 molecules (training set)
and tested on 2579 molecules (test set)
10-fold CV: ACC=0.77 / AUC=0.85
External: ACC=0.78 / AUC=0.86

No
Log Kp (skin permeation)?

Skin permeation: QSPR model implemented from
Potts RO and Guy RH. 1992 Pharm. Res.

-5.57 cm/s

Druglikeness

Lipinski?

Lipinski (Pfizer) filter: implemented from
Lipinski CA. et al. 2001 Adv. Drug Deliv. Rev.
MW ≤ 500
MLOGP ≤ 4.15
N or O ≤ 10
NH or OH ≤ 5

0.0
Ghose?

Ghose filter: implemented from
Ghose AK. et al. 1999 J. Comb. Chem.
160 ≤ MW ≤ 480
-0.4 ≤ WLOGP ≤ 5.6
40 ≤ MR ≤ 130
20 ≤ atoms ≤ 70

None
Veber?

Veber (GSK) filter: implemented from
Veber DF. et al. 2002 J. Med. Chem.
Rotatable bonds ≤ 10
TPSA ≤ 140

0.0
Egan?

Egan (Pharmacia) filter: implemented from
Egan WJ. et al. 2000 J. Med. Chem.
WLOGP ≤ 5.88
TPSA ≤ 131.6

0.0
Muegge?

Muegge (Bayer) filter: implemented from
Muegge I. et al. 2001 J. Med. Chem.
200 ≤ MW ≤ 600
-2 ≤ XLOGP ≤ 5
TPSA ≤ 150
Num. rings ≤ 7
Num. carbon > 4
Num. heteroatoms > 1
Num. rotatable bonds ≤ 15
H-bond acc. ≤ 10
H-bond don. ≤ 5

1.0
Bioavailability Score?

Abbott Bioavailability Score: Probability of F > 10% in rat
implemented from
Martin YC. 2005 J. Med. Chem.

0.56

Medicinal Chemistry

PAINS?

Pan Assay Interference Structures: implemented from
Baell JB. & Holloway GA. 2010 J. Med. Chem.

0.0 alert
Brenk?

Structural Alert: implemented from
Brenk R. et al. 2008 ChemMedChem

0.0 alert: heavy_metal
Leadlikeness?

Leadlikeness: implemented from
Teague SJ. 1999 Angew. Chem. Int. Ed.
250 ≤ MW ≤ 350
XLOGP ≤ 3.5
Num. rotatable bonds ≤ 7

No; 1 violation:MW<1.0
Synthetic accessibility?

Synthetic accessibility score: from 1 (very easy) to 10 (very difficult)
based on 1024 fragmental contributions (FP2) modulated by size and complexity penaties,
trained on 12'782'590 molecules and tested on 40 external molecules (r2 = 0.94)

1.51

Application In Synthesis of [ 1643-16-9 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Downstream synthetic route of [ 1643-16-9 ]

[ 1643-16-9 ] Synthesis Path-Downstream   1~35

  • 2
  • [ 1643-16-9 ]
  • [ 94410-57-8 ]
  • 5-(Dichloro-methanesulfonyl)-2-(4-isopropyl-phenoxymethyl)-1H-benzoimidazole [ No CAS ]
  • 3
  • [ 1643-16-9 ]
  • [ 530-62-1 ]
  • [ 173978-79-5 ]
  • 4
  • [ 1643-16-9 ]
  • [ 124-68-5 ]
  • [ 184879-00-3 ]
  • 5
  • [ 1643-16-9 ]
  • [ 620-20-2 ]
  • 3-(3-Chloro-phenyl)-2-(4-isopropyl-phenoxy)-propionic acid [ No CAS ]
  • 6
  • [ 184878-99-7 ]
  • [ 1643-16-9 ]
YieldReaction ConditionsOperation in experiment
Example 22: N-(3-Fluoro-4-methanesuIfonylaminobenzyl)-2-(4- isopropylphenoxy)acetamideStep 1 : Synthesis of 4-isopropylphenoxyacetic acid; To a solution of 4-isopropylphenol (0.38 g, 2.79 mmol) in acetonitrile (10 mL) were added cesium carbonate (1.37 g, 4.2 mmol) and ethyl bromoacetate (0.34 mL, 3.01 mmol). The resulting mixture was stirred for 1.5 hours at room temperature, concentrated under reduced pressure, and diluted with EtOAc and water. The organic layer was washed with brine and concentrated under reduced pressure. The crude residue was diluted with THF (7 mL) and 1 N LiOH (5 mL), and then stirred for 1 hour at room temperature. The mixture was acidified with 6 N HCI, concentrated under reduced pressure, and diluted with EtOAc and water. The organic layer was washed with brine, dried over anhydrous magnesium sulfate, filtered, and concentrated under reduced pressure. The crude residue was then purified by recrystallization from EtOAc/hexane to afford 0.35 g (64.6%) as a white solid. 1H NMR (300 MHz, CDCI3): delta 7.17 (d, 2 H, J = 8.7 Hz), 6.86 (d, 2 H, J = 8.7 Hz), <n="90"/>4.66 (s, 2 H), 2.87 (sept, 1 H1 J = 7.2 Hz), 1.22 (d, Q H1 J = 7.2 Hz)
YieldReaction ConditionsOperation in experiment
The high activity of these compounds, especially on bindweed, was by no means foreseeable and was all the more surprising insofar as related compounds such as 3,4-dimethylphenoxy acetic acid 4-isopropylphenoxy acetic acid 4-ethylphenoxy acetic acid 2-chloro-4-isopropylphenoxy acetic acid
  • 8
  • [ 1643-16-9 ]
  • 4-CH3C6H4CH2X X=Br or Cl [ No CAS ]
  • 2-(4-Isopropyl-phenoxy)-3-p-tolyl-propionic acid [ No CAS ]
  • 9
  • [ 1643-16-9 ]
  • 4-ClC6H4CH2X X=Br or Cl [ No CAS ]
  • 3-(4-Chloro-phenyl)-2-(4-isopropyl-phenoxy)-propionic acid [ No CAS ]
  • 10
  • [ 1643-16-9 ]
  • 4-BrC6H4CH2X X=Br or Cl [ No CAS ]
  • 3-(4-Bromo-phenyl)-2-(4-isopropyl-phenoxy)-propionic acid [ No CAS ]
  • 11
  • [ 1643-16-9 ]
  • 4-CH3OC6H4CH2X X=Br or Cl [ No CAS ]
  • 2-(4-Isopropyl-phenoxy)-3-(4-methoxy-phenyl)-propionic acid [ No CAS ]
  • 12
  • [ 1643-16-9 ]
  • 2,4-Cl2C6H3CH2X X=Br or Cl [ No CAS ]
  • 3-(2,4-Dichloro-phenyl)-2-(4-isopropyl-phenoxy)-propionic acid [ No CAS ]
  • 13
  • [ 1643-16-9 ]
  • β-naphthyl-CH2X X=Br or Cl [ No CAS ]
  • 2-(4-Isopropyl-phenoxy)-3-naphthalen-2-yl-propionic acid [ No CAS ]
  • 14
  • [ 1643-16-9 ]
  • 3,4-Cl2C6H3CH2X X=Br or Cl [ No CAS ]
  • 3-(3,4-Dichloro-phenyl)-2-(4-isopropyl-phenoxy)-propionic acid [ No CAS ]
  • 15
  • [ 1643-16-9 ]
  • [ 713517-90-9 ]
  • 5-(2,6-dichloro-benzyl)-1-(4-isopropyl-phenoxy)-9b-phenyl-5,9b-dihydro-1<i>H</i>-2a,5-diaza-benzo[<i>a</i>]cyclobuta[<i>c</i>]cycloheptene-2,4-dione [ No CAS ]
  • 16
  • [ 1643-16-9 ]
  • [ 478165-02-5 ]
  • <i>N</i>-{4-[4-(<i>tert</i>-butyl-dimethyl-silanyloxy)-5-(<i>tert</i>-butyl-dimethyl-silanyloxymethyl)-tetrahydro-furan-2-ylmethyl]-5-nitro-6-oxo-1,6-dihydro-pyrimidin-2-yl}-2-(4-isopropyl-phenoxy)-acetamide [ No CAS ]
  • 17
  • [ 1643-16-9 ]
  • [ 833480-26-5 ]
  • [ 833480-27-6 ]
  • 18
  • [ 1643-16-9 ]
  • [ 223128-33-4 ]
YieldReaction ConditionsOperation in experiment
With oxalyl dichloride; N,N-dimethyl-formamide; In tetrahydrofuran; for 2h; To a Stem'reaction tube containing (4-isopropylphenoxy) acetic acid (58.3 mg, 0.3 MMOL) in THF (0.5 mL) was added oxalyl chloride (25 muL, 0.3 MMOL) and a drop of DMF. The reaction mixture was flushed with nitrogen, capped and shaken for 2 hours. SOLID N- (3-AMINO-2-ETHYL- imidazo [1, 2-a] PYRAZIN-6-YL)-2, 2, 2-trifluoroacetamide (55 mg, 0.2 MMOL) and a solution of diisopropylethylamine (70 pL, 0.4 MMOL) in THF (0.5 mL) was added to the acid chloride solution and the reaction again flushed with nitrogen and capped. After heating to 60 OC for 16 hours, the tubes were uncapped and a solution of sodium hydroxide (40 mg, 1 MMOL) in H20 (0. 5 mL) added to the reaction mixture which was heated for a further 4 hours. The tubes were allowed cool and the contents diluted with DMSO (0.5 mL), filtered and purified by reverse-phase preparative HPLC to yield the desired amide (30) as a pale yellow solid (30.4 mg, 43%). HPLC 100% ; MS (ES) 356 [M+H] +.
With oxalyl dichloride; N,N-dimethyl-formamide; In dichloromethane; at 20℃; for 3h; General procedure: To a stirred suspension of various carboxylic acid 4a, 4b, 6a and 8a (1.0 equiv) in CH2Cl2 (25 mL) was added oxalyl chloride (3.0 equiv) and a catalytic amount of DMF. After stirring at room temperature for 3 h, the reaction was concentrated under reduced pressure to afford a yellow oil crude acyl chloride. To a solution of methyl 2-(4-amino-2-fluorophenoxy)acetate 3a (1.0 equiv) in CH2Cl2(25 mL) was added Et3N (1.5 equiv), and this mixture was cooled to -5 C. Subsequently, the crude acyl chloride obtained above was added in dropwise at a rate to ensure that the temperature did not exceed 0 C. The solution was stirred for another 2 hrs at 25 C, then washed successively with 10% HCl (2 × 25 mL), 10% NaHCO3 (2 × 25 mL) and brine (2 × 20 mL). The organic layer was dried over anhydrous sodium sulfate, filtered and the solvent was then evaporated to give the impure amide which was recrystallized from ethanol to give the desired products as colorless crystals. To a solution of the obtained crystals (1.0 equiv)in 2:3:1 THF/MeOH/H2O (18 ml) was added LiOH·H2O (1.5 equiv). After stirring at room temperature for 4 h, the volatiles were removed under reduced pressure. The residue was acidified with 1N hydrochloric acid solution, and then filtered and the filter cake was washed with 5 mL of water, dried in vacuum to afford a white powder. Recrystallization from 75% EtOH gave the desired compounds 8-11 and 13-36 as colorless crystals.
  • 19
  • [ 1643-16-9 ]
  • 4-ClC6H4CH2X X=Br or Cl [ No CAS ]
  • rac-(SR)-[(5SR)-1-(2,6-dichlorobenzyl)-2-oxo-5-phenyl-2,3,4,5-tetrahydro-1H-benzo[e][1,4]diazepin-5-yl]-(4-isopropylphenoxy)acetic acid [ No CAS ]
  • 20
  • [ 1643-16-9 ]
  • [ 479408-38-3 ]
  • 21
  • [ 1643-16-9 ]
  • [ 479408-42-9 ]
  • 22
  • [ 1643-16-9 ]
  • [ 479408-36-1 ]
  • 24
  • [ 1643-16-9 ]
  • [ 1026600-60-1 ]
  • 25
  • [ 1643-16-9 ]
  • 2-(4-Isopropyl-phenoxy)-3-(4-trifluoromethyl-phenyl)-propionic acid [ No CAS ]
  • 26
  • [ 1643-16-9 ]
  • 2-[1-(4-Isopropyl-phenoxy)-2-(4-trifluoromethyl-phenyl)-ethyl]-4,4-dimethyl-4,5-dihydro-oxazole [ No CAS ]
  • 27
  • [ 1643-16-9 ]
  • [ 184879-01-4 ]
  • 28
  • [ 1643-16-9 ]
  • 3-(3-Fluoro-phenyl)-2-(4-isopropyl-phenoxy)-propionic acid [ No CAS ]
  • 29
  • [ 1643-16-9 ]
  • 2-(4-Isopropyl-phenoxy)-3-(2-trifluoromethyl-phenyl)-propionic acid [ No CAS ]
  • 30
  • [ 1643-16-9 ]
  • N-[9-((2R,4S,5R)-4-Hydroxy-5-hydroxymethyl-tetrahydro-furan-2-yl)-9H-purin-6-yl]-2-(4-isopropyl-phenoxy)-acetamide [ No CAS ]
  • 31
  • [ 1643-16-9 ]
  • N-[9-((2R,3R,4S,5R)-3,4-Dihydroxy-5-hydroxymethyl-tetrahydro-furan-2-yl)-9H-purin-6-yl]-2-(4-isopropyl-phenoxy)-acetamide [ No CAS ]
  • 32
  • [ 1643-16-9 ]
  • N-[9-((2R,3R,4R,5R)-4-Hydroxy-5-hydroxymethyl-3-methoxy-tetrahydro-furan-2-yl)-9H-purin-6-yl]-2-(4-isopropyl-phenoxy)-acetamide [ No CAS ]
  • 33
  • [ 1643-16-9 ]
  • [ 7689-03-4 ]
  • [ 401478-54-4 ]
YieldReaction ConditionsOperation in experiment
80.0% With dmap; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; In dichloromethane; at 20℃; for 20h; The mixture of camptothecin (10 mg, 0.029 mmol), <strong>[1643-16-9]4-isopropylphenoxyacetic acid</strong> (8 mg, 0.42 mmol), EDCI (28 mg, 0.15 mmol), DMAP (2 mg, 0.02 mmol) and dichloromethane (3 ml) was stirred in the room temperature for 20 h, then dichloromethane (20 ml) was added to the solution. Organic layer was washed with water (20 ml), saturated NaHCO3 aqueous solution (10 ml) and brine (20 ml), and then dried over MgSO4. After the solvent was removed under reduced pressure, the resulting solid was separated by column chromatography (eluent: CHCl3:CH3OH 9:1) to afford 12 mg camptothecin-20-O-4-isopropylphenoxyacetate, yield: 80.0%, mp 208-210 C. The chemical structure analysis was performed by 1HNMR (CDCl3, 600 MHz): delta 8.42 (s, 1H, Ar-H), 8.23 (d, 1H, Ar-H), 7.98 (d, 1H, Ar-H), 7.85 (t, 1H, Ar-H), 7.69 (t, 1H, Ar-H), 7.10 (s, 2H, Ar-H), 6.84 (d, 2H, Ar-H), 5.63 (d, 1H, H17), 5.63 (d, 1H, H17), 5.25 (q, 2H, H5), 4.84 (q, 2H, OCH2CO), 2.72 (m, 1H, CHMe2), 2.21 (dm, 2H, CH2), 1.00 (m, 9H, CH3).
  • 34
  • [ 702679-58-1 ]
  • [ 1643-16-9 ]
  • 2-(3-{1-[(4-isopropylphenoxy)acetyl]piperidin-3-yl}phenoxy)-2-methylpropionic acid benzyl ester [ No CAS ]
YieldReaction ConditionsOperation in experiment
78% With 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; In dichloromethane; at 20℃; for 18h; To a solution of 4-isopropylphenol (1. 007g, 7.39 mmol) in 15 mL DIMETHYLFORMAMIDE was added potassium carbonate (2.04g, 14.79 mmol) and ethyl bromoacetate (1.23 mL, 11.09 MMOL). The reaction was stirred for 48 h at ambient temperature. The mixture was diluted with 500 mL water and extracted with diethyl ether (2 x 200 mL). The organic extracts were combined, dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The resultant oil was flash chromatographed with 10% ethyl acetate/hexanes to yield 1. 61G (98%) of ETHYL- (4-ISOPROPYLPHENOXY) acetate as a clear oil. MS (APCI) 223.3 (M + H) +. 'H NMR (400 MHz, CDCI3) 8 7.14 (d, 2H), 6.84 (d, 2H), 4.59 (s, 2H), 4.27 (q, 2H), 2.86 (m, 1H), 1.30 (t, 3H), 1.21 (d, 6H). A mixture of ETHYL- (4-ISOPROPYLPHENOXY) acetate (1.61g, 7.24 mmol) and 2N NaOH (aq) (10.9 mL) in 20 mL of methanol was stirred at ambient temperature for 3 h and concentrated under reduced pressure. The resulting residue was taken up in water (100 mL), acidified with 1N aqueous hydrochloric acid and extracted with ethyl acetate (2 x 100 mL). The organic extracts were combined, dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure to yield 1. 32G (94%) of <strong>[1643-16-9]4-isopropylphenoxyacetic acid</strong> as a white solid. MS (APCI) 195.3 (M + H) +. 'H NMR (400 MHz, CDCI3) 8 7.17 (d, 2H), 6.86 (d, 2H), 4.66 (s, 2H), 2.87 (m), 1 H), 1.22 (d, 6H). To a solution of 2-METHYL-2- (3-PIPERIDIN-3-YL-PHENOXY)-PROPIONIC acid benzyl ester (Preparation 2, Method C; 30 mg, 0.085 mmol) in 1 mL methylene chloride was added <strong>[1643-16-9]4-isopropylphenoxyacetic acid</strong> (33mg, 0.17 mmol) and 1- (3- DIMETHYLAMINOPROPYL)-3-ETHYLCARBODIIMIDE HYDROCHLORIDE (33mg, 0.17 mmol) and allowed to stir 18 h at ambient temperature. The reaction was concentrated under reduced pressure and the resultant oil flash chromatographed with 30% ethyl acetate/hexanes to yield 35mg (78%) OF 2- (3- {1- [ (4-ISOPROPYL-PHENOXY)-ACETYL]- PIPERIDIN-3-YL}-PHENOXY)-2-METHYL-PROPIONIC acid benzyl ester as a clear oil. LC-MS 530.6 (M + H) +. 'H NMR (400 MHz, CDCI3) S 7.24 (m, 5H), 7.14 (m, 3H), 6.89 (m, 2H), 6.83 (m, 1H), 6.71 (s, 1H), 6.61 (d, 1H), 5.19 (s, 2H), 4.64 (m, 3H), 4.07 (d, 1H), 3.04 (t, 1 H), 2.97 (m, 1 H), 2.89 (m, 1 H), 2.47 (m, 2H), 1.95 (m, 1 H), 1.82 (m, 1 H), 1.61, (s, 6H), 1.21 (d, 6H). 10% Palladium on carbon (4 mg, 10 wt%) was added to a solution of 2- (3- {1- [ (4-ISOPROPYL-PHENOXY)-ACETYL]-PIPERIDIN-3-YLL-PHENOXY)-2-METHYL-PROPIONIC ACID BENZYI ester (35 mg, 0.066 mmol) in methanol (2 mL) and the resulting mixture hydrogenated at atmospheric pressure for 3 h. The reaction mixture was filtered through a plug of celite and the celite plug washed thoroughly with ethyl acetate. The combined filtrates were concentrated under reduced pressure to provide 29 mg (99%) of 2-(3-{1-[(4-Isopropyl-phenoxy)-acetyl]-piperidin-3-yl]-phenoxy)-2-methyl- propionic acid as a clear oil. LC-MS 440.5 (M + H) +. 'H NMR (400 MHz, CDCI3) 8 7.19 (t, 1H), 7.14 (t, 2H), 6.87 (m, 3H), 6.81 (m, 2H), 4.66 (m, 3H), 4.04 (dd, 1 H), 3.05 (m, 1H), 2.85 (m, 1 H), 2.65 (m, 2H), 2.02 (t, 1H), 1.82 (t, 1H), 1.65 (m, 1H), 1.59, (s, 6H), 1.21 (d, 6H).
  • 35
  • [ 14062-21-6 ]
  • [ 1643-16-9 ]
YieldReaction ConditionsOperation in experiment
94% To a solution of 4-isopropylphenol (1. 007g, 7.39 mmol) in 15 mL DIMETHYLFORMAMIDE was added potassium carbonate (2.04g, 14.79 mmol) and ethyl bromoacetate (1.23 mL, 11.09 MMOL). The reaction was stirred for 48 h at ambient temperature. The mixture was diluted with 500 mL water and extracted with diethyl ether (2 x 200 mL). The organic extracts were combined, dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The resultant oil was flash chromatographed with 10% ethyl acetate/hexanes to yield 1. 61G (98%) of ETHYL- (4-ISOPROPYLPHENOXY) acetate as a clear oil. MS (APCI) 223.3 (M + H) +. 'H NMR (400 MHz, CDCI3) 8 7.14 (d, 2H), 6.84 (d, 2H), 4.59 (s, 2H), 4.27 (q, 2H), 2.86 (m, 1H), 1.30 (t, 3H), 1.21 (d, 6H). A mixture of ETHYL- (4-ISOPROPYLPHENOXY) acetate (1.61g, 7.24 mmol) and 2N NaOH (aq) (10.9 mL) in 20 mL of methanol was stirred at ambient temperature for 3 h and concentrated under reduced pressure. The resulting residue was taken up in water (100 mL), acidified with 1N aqueous hydrochloric acid and extracted with ethyl acetate (2 x 100 mL). The organic extracts were combined, dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure to yield 1. 32G (94%) of 4-isopropylphenoxyacetic acid as a white solid. MS (APCI) 195.3 (M + H) +. 'H NMR (400 MHz, CDCI3) 8 7.17 (d, 2H), 6.86 (d, 2H), 4.66 (s, 2H), 2.87 (m), 1 H), 1.22 (d, 6H). To a solution of 2-METHYL-2- (3-PIPERIDIN-3-YL-PHENOXY)-PROPIONIC acid benzyl ester (Preparation 2, Method C; 30 mg, 0.085 mmol) in 1 mL methylene chloride was added 4-isopropylphenoxyacetic acid (33mg, 0.17 mmol) and 1- (3- DIMETHYLAMINOPROPYL)-3-ETHYLCARBODIIMIDE HYDROCHLORIDE (33mg, 0.17 mmol) and allowed to stir 18 h at ambient temperature. The reaction was concentrated under reduced pressure and the resultant oil flash chromatographed with 30% ethyl acetate/hexanes to yield 35mg (78%) OF 2- (3- {1- [ (4-ISOPROPYL-PHENOXY)-ACETYL]- PIPERIDIN-3-YL}-PHENOXY)-2-METHYL-PROPIONIC acid benzyl ester as a clear oil. LC-MS 530.6 (M + H) +. 'H NMR (400 MHz, CDCI3) S 7.24 (m, 5H), 7.14 (m, 3H), 6.89 (m, 2H), 6.83 (m, 1H), 6.71 (s, 1H), 6.61 (d, 1H), 5.19 (s, 2H), 4.64 (m, 3H), 4.07 (d, 1H), 3.04 (t, 1 H), 2.97 (m, 1 H), 2.89 (m, 1 H), 2.47 (m, 2H), 1.95 (m, 1 H), 1.82 (m, 1 H), 1.61, (s, 6H), 1.21 (d, 6H). 10% Palladium on carbon (4 mg, 10 wt%) was added to a solution of 2- (3- {1- [ (4-ISOPROPYL-PHENOXY)-ACETYL]-PIPERIDIN-3-YLL-PHENOXY)-2-METHYL-PROPIONIC ACID BENZYI ester (35 mg, 0.066 mmol) in methanol (2 mL) and the resulting mixture hydrogenated at atmospheric pressure for 3 h. The reaction mixture was filtered through a plug of celite and the celite plug washed thoroughly with ethyl acetate. The combined filtrates were concentrated under reduced pressure to provide 29 mg (99%) of 2-(3-{1-[(4-Isopropyl-phenoxy)-acetyl]-piperidin-3-yl]-phenoxy)-2-methyl- propionic acid as a clear oil. LC-MS 440.5 (M + H) +. 'H NMR (400 MHz, CDCI3) 8 7.19 (t, 1H), 7.14 (t, 2H), 6.87 (m, 3H), 6.81 (m, 2H), 4.66 (m, 3H), 4.04 (dd, 1 H), 3.05 (m, 1H), 2.85 (m, 1 H), 2.65 (m, 2H), 2.02 (t, 1H), 1.82 (t, 1H), 1.65 (m, 1H), 1.59, (s, 6H), 1.21 (d, 6H).
 

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