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Chemical Structure| 174603-37-3 Chemical Structure| 174603-37-3

Structure of 174603-37-3

Chemical Structure| 174603-37-3

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Product Details of [ 174603-37-3 ]

CAS No. :174603-37-3
Formula : C9H6ClFO2
M.W : 200.59
SMILES Code : O=C(O)/C=C/C1=CC=C(F)C=C1Cl
MDL No. :MFCD00236027
InChI Key :RJCWBTRMWGOREZ-DUXPYHPUSA-N
Pubchem ID :6257297

Safety of [ 174603-37-3 ]

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H315-H319-H335
Precautionary Statements:P261-P280-P305+P351+P338-P304+P340-P405-P501

Computational Chemistry of [ 174603-37-3 ] Show Less

Physicochemical Properties

Num. heavy atoms 13
Num. arom. heavy atoms 6
Fraction Csp3 0.0
Num. rotatable bonds 2
Num. H-bond acceptors 3.0
Num. H-bond donors 1.0
Molar Refractivity 48.08
TPSA ?

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

37.3 Ų

Lipophilicity

Log Po/w (iLOGP)?

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

1.63
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

2.43
Log Po/w (WLOGP)?

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

2.89
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.

2.88
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

2.77
Consensus Log Po/w?

Consensus Log Po/w: Average of all five predictions

2.52

Water Solubility

Log S (ESOL):?

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

-2.82
Solubility 0.301 mg/ml ; 0.0015 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.

-2.86
Solubility 0.279 mg/ml ; 0.00139 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

-2.76
Solubility 0.348 mg/ml ; 0.00173 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.

-5.8 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

0.0
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

1.0 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)

2.18

Application In Synthesis of [ 174603-37-3 ]

* 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 [ 174603-37-3 ]

[ 174603-37-3 ] Synthesis Path-Downstream   1~28

  • 1
  • [ 141-82-2 ]
  • [ 84194-36-5 ]
  • [ 174603-37-3 ]
YieldReaction ConditionsOperation in experiment
95% With piperidine; pyridine; at 110℃; for 4h; The catalyst, piperidine (0.3 mmol), aldehyde (1 mmol) and malonic acid (1 mmol) were suspended in pyridine (2 mL), and the solution was stirred at 100 C. for 4 hours. Then, the reaction mixture was cooled to 0 C., and then it was acidified with HCl solution (conc., 5 mL). By filtering the solid formed finally and drying, I1 was prepared (95%).
93% With piperidine; for 4h;Reflux; General procedure: The suitable aldehyde (10 mmol), malonic acid (30 mmol, 3.12 g) and piperidine (0.5 mL) were dissolved in pyridine (20 mL) and the mixture was heated under reflux for 4 h. The solution was cooled to room temperature and poured in ice-cold aqueous HCl (100 mL,3 M). The white solid precipitate was filtered, washed with water (350 mL), aqueous NaHCO3 (20 mL, 5% w/v), then again with water (250 mL) and dried in an oven (60 C). If required, the crude solid was recrystallysed from EtOH/H2O.
  • 2
  • [ 174603-37-3 ]
  • [ 174603-38-4 ]
  • 3
  • [ 90319-52-1 ]
  • [ 174603-37-3 ]
  • (R)-3-[(E)-3-(2-Chloro-4-fluoro-phenyl)-acryloyl]-4-phenyl-oxazolidin-2-one [ No CAS ]
  • 4
  • [ 174603-37-3 ]
  • (2S,3S)-2-Azido-3-(2-chloro-4-fluoro-phenyl)-butyric acid [ No CAS ]
  • 5
  • [ 174603-37-3 ]
  • (2S,3S)-2-Azido-3-(2-chloro-4-fluoro-phenyl)-1-((S)-3-fluoro-pyrrolidin-1-yl)-butan-1-one [ No CAS ]
  • 6
  • [ 174603-37-3 ]
  • (2S,3S)-2-Amino-3-(2-chloro-4-fluoro-phenyl)-1-((S)-3-fluoro-pyrrolidin-1-yl)-butan-1-one [ No CAS ]
  • 7
  • [ 174603-37-3 ]
  • (R)-3-[3-(2-Chloro-4-fluoro-phenyl)-butyryl]-4-phenyl-oxazolidin-2-one [ No CAS ]
  • 8
  • [ 174603-37-3 ]
  • (R)-3-[(2R,3S)-2-Bromo-3-(2-chloro-4-fluoro-phenyl)-butyryl]-4-phenyl-oxazolidin-2-one [ No CAS ]
  • 9
  • [ 174603-37-3 ]
  • (R)-3-[(2S,3S)-2-Azido-3-(2-chloro-4-fluoro-phenyl)-butyryl]-4-phenyl-oxazolidin-2-one [ No CAS ]
  • 10
  • [ 174603-37-3 ]
  • 3-(2-chloro-4-fluorophenyl)propionyl chloride [ No CAS ]
  • 11
  • [ 174603-37-3 ]
  • [ 166250-01-7 ]
  • 12
  • [ 174603-37-3 ]
  • (Z)-2-(4-chloro-6-fluoro-1-indanylidene)acetic acid [ No CAS ]
  • 13
  • [ 174603-37-3 ]
  • (E)-2-(4-chloro-6-fluoro-1-indanylidene)acetic acid [ No CAS ]
  • 14
  • [ 174603-37-3 ]
  • [ 166251-36-1 ]
  • 15
  • [ 174603-37-3 ]
  • [ 166251-35-0 ]
  • 16
  • [ 110-89-4 ]
  • [ 84194-36-5 ]
  • [ 174603-37-3 ]
YieldReaction ConditionsOperation in experiment
24.4 g (96%) With hydrogenchloride; malonic acid; In pyridine; water; Preparation of 2-Chloro-4-Fluorocinnamic acid To a mixture of 2-chloro-4-fluorobenzaldehyde (20.0 g, 0.13 mol, Aldrich) and malonic acid (26.2 g, 0.25 mol, Aldrich) in pyridine (100 ml) at 50 C. was added dropwise piperidine (10 ml). After 18 h at 70 C., the mixture was poured into an ice cold solution of concentrated HCl (120 ml) and water (1.5 L). The resulting solid was filtered and washed repeatedly with water to give 24.4 g (96%) of 2-chloro-4-fluoro-cinnamic acid as a white solid: Recrystallization of 1.5 g from acetone:water mixtures gave 1.1 g of 2-chloro-4-fluorocinnamic acid as a white solid: mp 243-245 C.
  • 17
  • platinum (IV) oxide monohydrate [ No CAS ]
  • [ 174603-37-3 ]
  • [ 174603-38-4 ]
YieldReaction ConditionsOperation in experiment
22.6 g (98%) In ethanol; b) Preparation of 3-(2-Chloro-4-fluorophenyl)propanoic Acid A mixture of <strong>[174603-37-3]2-chloro-4-fluorocinnamic acid</strong> (22.9 g, 0.11 mol) and platinum oxide hydrate (0.5 g, EM Scientific) in 95% ethanol (140 ml) was placed on a Parr hydrogenation apparatus. After the appropriate amount of hydrogen was taken up, the catalyst was filtered and the mixture was concentrated in vacuo to give 22.6 g (98%) of 3-(2-chloro-4-fluorophenyl)propanoic acid as a purple solid. This material was used without further purification.
  • 18
  • [ 174603-37-3 ]
  • muramyl dipeptide [ No CAS ]
YieldReaction ConditionsOperation in experiment
In trifluoroacetic acid; Example 15 Solid-Phase Synthesis of Muramyl Dipeptide MDA-205 Solid-phase synthesis strategy was employed. Rink-Amide AM resin (loading 0.88 mmol/g) was chosen, Fmoc-Lys(Boc)-COOH, Fmoc-D-iso-Gln-COOH, Fmoc-Ala-COOH and <strong>[174603-37-3]2-chloro-4-fluorocinnamic acid</strong> were introduced to resin in sequence. After the completion of the condensation, the resin was sufficiently washed and the solvent was drained, and the resin was cleaved for 1 hour in 90% (volume percentage) TFA aqueous solution. The solvent was removed under vacuum, the residue was subjected to a large amount of ether in ice bath, white solid precipitated immediately. The mixture was filtered, and the crude product was obtained with yield of 86%. The crude product was purified by ODS column chromatography, and white solid with a purity of 98.5% was obtained through lypophilization. m.p.=137˜138 C. 1H-NMR (300 MHz, DMSO-d6): 7.55 (1H, dd, J=8.7 and 1.8 Hz, 2-H), 7.77 (1H, m, 5-H), 7.36 (1H, m, 6-H), 7.66 (1H, d, J=15.9 Hz, 7-H), 6.79 (1H, d, J=15.9 Hz, 8-H), 8.47 (1H, d, J=6.6 Hz, 10-H), 4.42 (1H, m, 11-H), 1.27 (3H, d, J=6.9 Hz, 12-H), 8.24 (1H, d, J=8.4 Hz, 14-H), 4.16 (1H, m, 15-H), 7.00 (1H, s, 17-Ha), 7.31 (1H, s, 17-Hb), 1.72 (1H, m, 18-Ha), 1.99 (1H, m, 18-Hb), 2.17 (2H, t, J=7.8 Hz, 19-H), 7.91 (1H, d, J=8.7 Hz, 21-H), 4.13 (1H, m, 22-H), 7.12 (1H, s, 24-Ha), 7.33 (1H, s, 24-HA 1.49 (1H, m, 25-Ha), 1.65 (1H, m, 25-Hb), 1.30 (2H, m, 26-H), 1.52 (2H, m, 27-H), 2.75 (2H, br.s, 28-H), 7.79 (2H, br.s, 29-H). 13C-NMR (125 MHz, DMSO-d6): 162.7 (d, J=250.0 Hz, 1-C), 115.9 (d, J=21.6 Hz, 2-C), 134.6 (d, J=10.0 Hz, 3-C), 129.9 (d, J=3.8 Hz, 4-C), 129.7 (d, J=10.0 Hz, 5-C), 117.7 (d, J=25.1 Hz, 3-C), 137.5 (7-C), 125.4 (8-C), 164.8 (9-C), 49.3 (11-C), 18.6 (12-C), 172.1 (13-C), 52.6 (15-C), 174.2 (16-C), 28.2 (18-C), 32.2 (19-C), 172.1 (20-C), 52.5 (22-C), 173.7 (23-C), 31.8 (25-C), 22.9 (26-C), 27.2 (27-C), 38.2 (28-C). IR: 3279.8 (νOH and νNH), 3066.0 (ν=CH), 2937.1 (ν-CH), 1776.1, 1656.3 (νC=O), 1537.0, 1489.0, 1452.2 (νC=C), 1238.1, 1201.1, 1181.0, 1135.6 (νC-F and δ-CH), 910.6, 835.5, 800.1, 721.3 (νC-Cl and δ=CH). ESI-MS: 527.28 [M+H]+, 1075.00 [2M+Na]+. HR-MS (TOF): 527.2201 [M+H]+, C23H32ClFN6O5.
In trifluoroacetic acid; Example 15 Solid-Phase Synthesis of Muramyl Dipeptide MDA-205 Solid-phase synthesis strategy was employed. Rink-Amide AM resin (loading 0.88 mmol/g) was chosen, Fmoc-Lys(Boc)-COOH, Fmoc-D-iso-Gln-COOH, Fmoc-Ala-COOH and <strong>[174603-37-3]2-chloro-4-fluorocinnamic acid</strong> were introduced to resin in sequence. After the completion of the condensation, the resin was sufficiently washed and the solvent was drained, and the resin was cleaved for 1 hour in 90% (volume percentage) TFA aqueous solution. The solvent was removed under vacuum, the residue was subjected to a large amount of ether in ice bath, white solid precipitated immediately. The mixture was filtered, and the crude product was obtained with yield of 86%. The crude product was purified by ODS column chromatography, and white solid with a purity of 98.5% was obtained through lypophilization. m.p.=137˜138 C. 1H-NMR (300 MHz, DMSO-d6): 7.55 (1H, dd, J=8.7 and 1.8 Hz, 2-H), 7.77 (1H, m, 5-H), 7.36 (1H, m, 6-H), 7.66 (1H, d, J=15.9 Hz, 7-H), 6.79 (1H, d, J=15.9 Hz, 8-H), 8.47 (1H, d, J=6.6 Hz, 10-H), 4.42 (1H, m, 11-H), 1.27 (3H, d, J=6.9 Hz, 12-H), 8.24 (1H, d, J=8.4 Hz, 14-H), 4.16 (1H, m, 15-H), 7.00 (1H, s, 17-Ha), 7.31 (1H, s, 17-Hb), 1.72 (1H, m, 18-Ha), 1.99 (1H, m, 18-Hb), 2.17 (2H, t, J=7.8 Hz, 19-H), 7.91 (1H, d, J=8.7 Hz, 21-H), 4.13 (1H, m, 22-H), 7.12 (1H, s, 24-Ha), 7.33 (1H, s, 24-Hb), 1.49 (1H, m, 25-Ha), 1.65 (1H, m, 25-Hb), 1.30 (2H, m, 26-H), 1.52 (2H, m, 27-H), 2.75 (2H, br.s, 28-H), 7.79 (2H, br.s, 29-H). 13C-NMR (125 MHz, DMSO-d6): 162.7 (d, J=250.0 Hz, 1-C), 115.9 (d, J=21.6 Hz, 2-C), 134.6 (d, J=10.0 Hz, 3-C), 129.9 (d, J=3.8 Hz, 4-C), 129.7 (d. J=10.0 Hz, 5-C), 117.7 (d, J=25.1 Hz, 3-C), 137.5 (7-C), 125.4 (8-C), 164.8 (9-C), 49.3 (11-C), 18.6 (12-C), 172.1 (13-C), 52.6 (15-C), 174.2 (16-C), 28.2 (18-C), 32.2 (19-C), 172.1 (20-C), 52.5 (22-C), 173.7 (23-C), 31.8 (25-C), 22.9 (26-C), 27.2 (27-C), 38.2 (28-C). IR: 3279.8 (νOH and νNH), 3066.0 (ν=CH), 2937.1 (ν-CH), 1776.1, 1656.3 (νC=O), 1537.0, 1489.0, 1452.2 (νC=C), 1238.1, 1201.1, 1181.0, 1135.6 (νC-F and δ-CH), 910.6, 835.5, 800.1, 721.3 (νC-Cl and δ=CH). ESI-MS: 527.28 [M+H]+, 1075.00 [2M+Na]+. HR-MS(TOF): 527.2201 [M+H]+, C23H32ClFN6O5.
  • 19
  • [ 1809-20-7 ]
  • [ 174603-37-3 ]
  • diisopropyl (E)-(2-chloro-4-fluorostyryl)phosphonate [ No CAS ]
  • 20
  • [ 174603-37-3 ]
  • (S)-2-amino-3-(2-chloro-4-fluorophenyl)propanoic acid [ No CAS ]
YieldReaction ConditionsOperation in experiment
With ammonium hydroxide; carbon dioxide; In dimethyl sulfoxide; at 37℃; for 12h;pH 10.0;Enzymatic reaction; General procedure: The suitable aldehyde 1j-l, 1n or 1o (0.5 mmol), malonic acid (1.0 mmol) and piperidine (0.01 mmol) were dissolved in DMSO (500 mL) and the mixture was heated in a microwave reactor (30 min, 60 C). After cooling, ammonia solution (9.5 mL, 13% w/v,approx. 7 M, adjusted to pH 10.0 by slow addition of dry ice chunks) was added, followed by E. coli BL21(DE3) cells overproducing the required PAL (400 mg wet cell paste). The suspension was stirred at 37 C for several hours, monitoring the conversion by HPLC. For product isolation, the reaction mixture was acidified to pH <2.0 using aqueous H2SO4 (20% w/v) and centrifuged (8000 rpm, 5 min) to remove cells and precipitated unconverted substrate. Dowex 50WX8 hydrogen form resin (5.0 g), packed in a disposable plastic column, was washed with deionised water (20 mL) and aqueous H2SO4 (20 mL, 5% w/v). The supernatant from the biotransformation was loaded onto the resin (1 mL min1). The resin bed was washed with deionised water until the flow-through tested neutral, then the product was eluted with aqueous NH4OH (20 mL, 5% w/v). Fractions containing the product were pooled and dried overnight in a centrifugal evaporator, to afford the corresponding L-phenylalanine L-3j-l, L-3n or L-3o as a white solid.
  • 21
  • [ 35661-39-3 ]
  • [ 71989-26-9 ]
  • [ 76-05-1 ]
  • [ 292150-20-0 ]
  • [ 174603-37-3 ]
  • C23H32ClFN6O5*C2HF3O2 [ No CAS ]
  • 22
  • [ 35661-39-3 ]
  • [ 288149-55-3 ]
  • [ 71989-26-9 ]
  • [ 174603-37-3 ]
  • C23H32ClFN6O5*C2HF3O2 [ No CAS ]
  • 23
  • [ 35661-39-3 ]
  • [ 288149-55-3 ]
  • [ 71989-26-9 ]
  • [ 174603-37-3 ]
  • MDA-205+ [ No CAS ]
  • 24
  • [ 71989-26-9 ]
  • [ 174603-37-3 ]
  • C24H33ClFN5O6*C2HF3O2 [ No CAS ]
  • 25
  • [ 174603-37-3 ]
  • [ 695186-89-1 ]
YieldReaction ConditionsOperation in experiment
With oxalyl dichloride; N,N-dimethyl-formamide; In dichloromethane; at 20℃; for 5h;Inert atmosphere; General procedure: To a solution of cinnamic acid (1a01e24, 1a26e27, 1a29)(1.0 mmol) in dry CH2Cl2 was added oxalyl chloride (5.0 equiv) anda catalytic amount of DMF (0.01 equiv). The reaction mixture wasstirred at room temperature for 5 h before the solvent wasremoved. The residuewas dried under high vacuum and used in thenext step without further purification.
  • 26
  • [ 174603-37-3 ]
  • (E)-1-[(E)-3-(2-chloro-4-fluorophenyl)acryloyl]-3-(3,4,5-trimethoxybenzylidene)piperidin-2-one [ No CAS ]
  • 27
  • [ 57676-50-3 ]
  • [ 174603-37-3 ]
  • (E)-2-(4-bromobenzyl)-5-(2-chloro-4-fluorostyryl)-1,3,4-oxadiazole [ No CAS ]
YieldReaction ConditionsOperation in experiment
85% With trichlorophosphate; at 100℃;Sealed tube; <strong>[174603-37-3](E)-3-(2-chloro-4-fluorophenyl)acrylic acid</strong> I1 (1 mmol) and 2-(4-bromophenyl)acetohydrazide (1 mmol) were suspended in POCl3 (2 mL), and the mixture was heated by 100 C. overnight. After completion of the reaction, the solvent was evaporated and the residues were cooled down with 2N NaOH. The mixture was extracted with EtOAc and was washed with water. The organic layer was dried with MgSO4 and was concentrated. By purifying the crude residues were purified by column chromatography (n-hexane:ethyl acetate=5:1), I2 of a pale yellow solid was prepared (85%).
  • 28
  • [ 1108137-69-4 ]
  • [ 174603-37-3 ]
  • C31H35ClFNO5Si [ No CAS ]
YieldReaction ConditionsOperation in experiment
With dmap; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; In dichloromethane; at 35℃;Inert atmosphere; a: In a 250ml round-bottomed reaction flask, dissolve 2-tert-butyldimethylsilyl-lycorine INB (10.0mmol) and 4-fluoro-2-chlorocinnamic acid (12.0mmol) in 50ml of dichloromethane, at room temperature Under the protection of nitrogen, EDCI.HCl (18.0 mmol) and DMAP (1.0 mmol) were sequentially added.After the addition, the reaction is kept at 35C while stirring. After HPLC tracking detects that the remaining amount of INB is less than 8%, it can be post-processed.The reaction solution was washed with 100 ml of purified water and 100 ml of 10% sodium chloride solution successively, and then concentrated under reduced pressure for later use.
 

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