Structure of 3112-85-4
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The BI-3802 was designed by Boehringer Ingelheim and could be obtained free of charge through the Boehringer Ingelheim open innovation portal opnMe.com, associated with its negative control.
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Morningstar, John Tanner ;
Abstract: Molecular electronics is a continuously growing field which attempts to solve the problem that their solid-state counterparts encounter with continuing to grow smaller while maintaining the same functionality. Although successful molecular electronics have been created, their level of functionality does not yet match solid states. Furthering the field involves elucidating the mechanism of rectification and continuing to grow the library of compounds available. To accomplish this, we have successfully synthesized twenty new alkylsilanes which exhibit rectification behavior. We were able to draw several conclusions about promising scaffolds through examination of terminal groups with electron withdrawing and donating substituents, nitrogen heterocycles, and sterically hindered substituents. Additionally, our compounds were subjected to doping of the selfassembled monolayer devices which we found to benefit rectification. It was hypothesized that adding electron withdrawing groups, large and soft atoms, and groups with non-bonding electrons would also boost rectification. We obtained compounds with R ratios as high as 8500. This value is the highest our group has achieved to date. Biopolymers are commonly used as drug delivery scaffolds due to their safety and resistance to environmental stimuli. Alginate is one such polymer which has garnered increased attention as of late. To improve the properties of alginate for this purpose, we have developed a method to quantitatively modify the backbone of alginate with small molecules via sodium periodate oxidation and reductive amination of the corresponding oxidized product. Examining the difference in modified alginate with a small unsubstituted aromatic ring as well as an aromatic ketone, ester, and carboxylic acid allowed us to determine which molecules are beneficial to environmental pH sensitivity. xiv We successfully synthesized three new quantitatively modified alginates and examined their pH sensitivity using hydrogel beading studies. Each new compound shows distinct pH response; however, our expectations were met as our original benzoic acid modified product still holds the most desirable degradation profile.
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CAS No. : | 3112-85-4 |
Formula : | C7H8O2S |
M.W : | 156.20 |
SMILES Code : | O=S(C1=CC=CC=C1)(C)=O |
MDL No. : | MFCD00014741 |
InChI Key : | JCDWETOKTFWTHA-UHFFFAOYSA-N |
Pubchem ID : | 18369 |
GHS Pictogram: |
![]() |
Signal Word: | Warning |
Hazard Statements: | H302 |
Precautionary Statements: | P280-P305+P351+P338 |
Num. heavy atoms | 10 |
Num. arom. heavy atoms | 6 |
Fraction Csp3 | 0.14 |
Num. rotatable bonds | 1 |
Num. H-bond acceptors | 2.0 |
Num. H-bond donors | 0.0 |
Molar Refractivity | 39.54 |
TPSA ? Topological Polar Surface Area: Calculated from |
42.52 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
1.26 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
0.5 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
2.17 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
1.51 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
1.12 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
1.31 |
Log S (ESOL):? ESOL: Topological method implemented from |
-1.5 |
Solubility | 4.92 mg/ml ; 0.0315 mol/l |
Class? Solubility class: Log S scale |
Very soluble |
Log S (Ali)? Ali: Topological method implemented from |
-0.96 |
Solubility | 17.0 mg/ml ; 0.109 mol/l |
Class? Solubility class: Log S scale |
Very soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-2.69 |
Solubility | 0.315 mg/ml ; 0.00202 mol/l |
Class? Solubility class: Log S scale |
Soluble |
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) |
No |
CYP1A2 inhibitor? Cytochrome P450 1A2 inhibitor: SVM model built on 9145 molecules (training set) |
No |
CYP2C19 inhibitor? Cytochrome P450 2C19 inhibitor: SVM model built on 9272 molecules (training set) |
No |
CYP2C9 inhibitor? Cytochrome P450 2C9 inhibitor: SVM model built on 5940 molecules (training set) |
No |
CYP2D6 inhibitor? Cytochrome P450 2D6 inhibitor: SVM model built on 3664 molecules (training set) |
No |
CYP3A4 inhibitor? Cytochrome P450 3A4 inhibitor: SVM model built on 7518 molecules (training set) |
No |
Log Kp (skin permeation)? Skin permeation: QSPR model implemented from |
-6.9 cm/s |
Lipinski? Lipinski (Pfizer) filter: implemented from |
0.0 |
Ghose? Ghose filter: implemented from |
None |
Veber? Veber (GSK) filter: implemented from |
0.0 |
Egan? Egan (Pharmacia) filter: implemented from |
0.0 |
Muegge? Muegge (Bayer) filter: implemented from |
1.0 |
Bioavailability Score? Abbott Bioavailability Score: Probability of F > 10% in rat |
0.55 |
PAINS? Pan Assay Interference Structures: implemented from |
0.0 alert |
Brenk? Structural Alert: implemented from |
0.0 alert: heavy_metal |
Leadlikeness? Leadlikeness: implemented from |
No; 1 violation:MW<1.0 |
Synthetic accessibility? Synthetic accessibility score: from 1 (very easy) to 10 (very difficult) |
1.63 |
* 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.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
82% | To a solution of (methylsulfonyl)benzene (2.2 g, 13.9 mmol) in THF (38 mL) at 0 was added n-BuLi (2.5 M in hexanes, 12.2 mL, 30.6 mmol) dropwise over 10 minutes. After the mixture was stirred for 30 min, chlorodiethylphosphonate (2.4 mL, 16.7 mmol) was added dropwise to the reaction. After 30 minutes, a solution of oxetan-3-one (1.0 g, 13.9 mmol) in THF (2 mL) was added dropwise to the reaction mixture at -78 . The reaction mixture was stirred at -78 for 2 hours, then diluted with aqueous NH4Cl (100 mL) and extracted with EtOAc (100 mL x 2) . The combined organic layers were concentrated and the residue was purified by silica gel chromatxography column (petroleum ether/EtOAc = 3/1) to give the title compound (2.4 g, 82%) as a colorless oil. 1H NMR (400 MHz, CDCl3) : delta7.90-7.88 (m, 2H) , 7.68-7.64 (m, 1H) , 7.57 (t, J= 7.6 Hz, 2H) , 6.13-6.11 (m, 1H) , 5.66-5.64 (m, 2H) , 5.30-5.27 (m, 2H). | |
75% | 3-((Phenylsulfonyl)methylene)oxetane To an oven-dried vial was added (methylsulfonyl)benzene (0.570 g, 3.65 mmol) and the vial was evacuated with argon 3 times. The dry THF (17 mL) was added and the reaction was cooled to 0 C. The 2.5 M BuLi in hexanes (3.21 mL, 8.03 mmol) was added dropwise and the reaction began to stir at 0 C. and stirred for 45 minutes. The diethyl chlorophosphate (0.528 mL, 3.65 mmol) was then added at 0 C. and the reaction stirred for 30 minutes. The reaction was then cooled to -78 C. and the oxetan-3-one (0.330 mL, 5.15 mmol) was then added dropwise and the reaction stirred for 2 h. The reaction was then warmed to rt and filtered through a silica plug. The reaction was then concentrated onto silica and purified by MPLC (20 min, 0-40% EtOAc:hex) to provide pure 3-((phenylsulfonyl)methylene)oxetane (0.579 g, 2.75 mmol, 75% yield). 1H NMR (400 MHz, CDCl3): delta 7.91-7.87 (m, 2H), 7.69-7.64 (m, 1H), 7.60-7.55 (m, 2H), 6.12 (quintet, J=2.3 Hz, 1H), 5.66-5.63 (m, 2H), 5.30-5.27 (m, 2H). | |
74% | To a stirred solution of methyiphenylsulfone (3 g, 19.2 mmol) in dry tetrahydrofuran (15 mL) was added n-butyllithium (2.5 M in tetrahydrofuran; 15.4 mL, 38.4 mmol) at 0 C. Thereaction mixture was stirred for 30 mi Diethyl chiorophosphate (4 mL, 27.8 mmol) wasadded, and the mixture was stirred at 0 C for an additional 30 mm. It was then cooled to -78C, and a solution of 3-oxetanone (1.38 g, 19.2 mmol) in dry tetrahydrofuran (3 mL) wasadded. The mixture was stirred at -78 C for 1.5 h and filtered through a silica plug to give 3-((phenylsulfonyl)methylene)oxetane as a white solid (3 g, 74%). ?H NMR (400 MHz, CDC13)oe 7.90 - 7.87 (m, 2H), 7.66 - 7.64 (m, 1H), 7.59 - 7.56 (m, 2H), 6.12 (s, 1H), 5.65 (d, J =6.0Hz, 2H), 5.29 (d, J =5.6 Hz, 2H). |
Example 1313-A. 3-((Phenylsulfonyl)methylene)oxetane.A solution of BuLi (2.5 M in hexanes, 22.5 mL, 56.3 mmol) was added over 10 min to a solution of methylphenylsulfone (4.00 g, 25.6 mmol) in THF (70 mL) at 0 C. The solution went from clear to light green to a heterogeneous yellow suspension. The mixture was stirred for 30 min at 0 C and then chlorodiethylphosphonate (4.46 mL, 30.7 mmol) was added dropwise and the stirring was continued for 30 min, at which point the solution turned clear orange. The reaction mixture was then cooled to -78 C and oxetan-3-one (1.85 g, 25.6 mmol) was added in THF (3 mL). The reaction mixture turned pale brown/yellow in color. After stirring for another 1.5 h, the reaction mixture was filtered through a plug of silica gel. The filtrate was triturated with solid NH4C1 until pH reached 7. The mixture was then filtered and the filtrate was concentrated. The residue was purified by silica gel chromatography (0-60%EtOAc/heptane) to provide 3-((phenylsulfonyl)methylene)oxetane. 1H NMR (400 MHz, CD2C12) delta ppm 7.86 - 7.99 (m, 2 H) 7.68 - 7.77 (m, 1 H) 7.57 - 7.68 (m, 2 H) 6.18 (t, J=2.40 Hz, 1 H) 5.59 - 5.70 (m, 2 H) 5.30 (td, J=3.41, 2.27 Hz, 2 H) | ||
Example 34 Preparation of 3-(phenylsulfonylmethylene)oxetane [0275] In a dry 100 mL flask, methylsulfonylbenzene (1.00 g, 6.41 mmoles) in a solution of dry tetrahydrofuran was 2.5 M n-buLi added at 0C over 10 mins then stirred for 30 mins. Chlorodiethylphosphonate (1.1 mL) was added dropwise and continued to stir for 30 mins before cooling to -78C. Oxetan-3-one (0.65 g, 9.04 mmoles) in dry diethylether (1.0 mL) was added and stirred for 1.5h. The reaction was filtered through a silica plug and to get pure product. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
62% | With aluminum (III) chloride; at 200℃; for 3h;Inert atmosphere; | General procedure: In a 10 mL round-bottomed flask, (phenylsulfonyl)acetonitrile (544mg, 3.0 mmol, 1.0 equiv) was added to a mixture of acid 1(3.0mmol) and AlCl3(8 mg, 0.06 mmol, 0.02 equiv). The mixture was then stirred under argon at 200 C for 3 h. After completion of the reaction, the crude mixture was diluted with CH2Cl2(5 mL + 5 mL),silica gel (3 g) was then added to make a solid deposit after evaporation of the solvent. A silica gel column chromatography (eluent:PE-EtOAc, 95:5) finally afforded the pure nitrile together with methyl phenyl sulfone. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
53% | With aluminum (III) chloride; at 200℃; for 3h;Inert atmosphere; | General procedure: In a 10 mL round-bottomed flask, (phenylsulfonyl)acetonitrile (544mg, 3.0 mmol, 1.0 equiv) was added to a mixture of acid 1(3.0mmol) and AlCl3(8 mg, 0.06 mmol, 0.02 equiv). The mixture was then stirred under argon at 200 C for 3 h. After completion of the reaction, the crude mixture was diluted with CH2Cl2(5 mL + 5 mL),silica gel (3 g) was then added to make a solid deposit after evaporation of the solvent. A silica gel column chromatography (eluent:PE-EtOAc, 95:5) finally afforded the pure nitrile together with methyl phenyl sulfone. |
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