Acetic acid (S)-4-[(2S,4aR,4bS,6aS,6bS,9aS,10aS,10bS)-2-(tert-butyl-diphenyl-silanyloxy)-4a,6a,7-trimethyl-2,3,4,4a,4b,5,6,6a,6b,9a,10,10a,10b,11-tetradecahydro-1H-9-oxa-pentaleno[2,1-a]phenanthren-8-yl]-2-methyl-butyl ester

Base Information

• Chemical Name: Acetic acid (S)-4-[(2S,4aR,4bS,6aS,6bS,9aS,10aS,10bS)-2-(tert-butyl-diphenyl-silanyloxy)-4a,6a,7-trimethyl-2,3,4,4a,4b,5,6,6a,6b,9a,10,10a,10b,11-tetradecahydro-1H-9-oxa-pentaleno[2,1-a]phenanthren-8-yl]-2-methyl-butyl ester
• CAS No.: 151534-40-6
• Molecular Formula: C₄₅H₆₂O₄Si
• Molecular Weight: 695.07
• Mol file: 151534-40-6.mol

Synonyms:

Chemical Property of Acetic acid (S)-4-[(2S,4aR,4bS,6aS,6bS,9aS,10aS,10bS)-2-(tert-butyl-diphenyl-silanyloxy)-4a,6a,7-trimethyl-2,3,4,4a,4b,5,6,6a,6b,9a,10,10a,10b,11-tetradecahydro-1H-9-oxa-pentaleno[2,1-a]phenanthren-8-yl]-2-methyl-butyl ester

Chemical Property:

Purity/Quality:

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

Useful:

Technology Process of Acetic acid (S)-4-[(2S,4aR,4bS,6aS,6bS,9aS,10aS,10bS)-2-(tert-butyl-diphenyl-silanyloxy)-4a,6a,7-trimethyl-2,3,4,4a,4b,5,6,6a,6b,9a,10,10a,10b,11-tetradecahydro-1H-9-oxa-pentaleno[2,1-a]phenanthren-8-yl]-2-methyl-butyl ester

There total 1 articles about Acetic acid (S)-4-[(2S,4aR,4bS,6aS,6bS,9aS,10aS,10bS)-2-(tert-butyl-diphenyl-silanyloxy)-4a,6a,7-trimethyl-2,3,4,4a,4b,5,6,6a,6b,9a,10,10a,10b,11-tetradecahydro-1H-9-oxa-pentaleno[2,1-a]phenanthren-8-yl]-2-methyl-butyl ester which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 18.0%

acetic anhydride (108-24-7) + 3-tert-butyldiphenylsilyldiosgenin (151534-39-3) → Acetic acid (S)-4-[(2S,4aR,4bS,6aS,6bS,9aS,10aS,10bS)-2-(tert-butyl-diphenyl-silanyloxy)-4a,6a,7-trimethyl-2,3,4,4a,4b,5,6,6a,6b,9a,10,10a,10b,11-tetradecahydro-1H-9-oxa-pentaleno[2,1-a]phenanthren-8-yl]-2-methyl-butyl ester (151534-40-6) + Acetic acid (S)-4-[(2S,4aR,4bS,6aS,6bS,9aS,10aS,10bS)-7-acetyl-2-(tert-butyl-diphenyl-silanyloxy)-4a,6a,7-trimethyl-1,2,3,4,4a,4b,5,6,6a,6b,7,9a,10,10a,10b,11-hexadecahydro-9-oxa-pentaleno[2,1-a]phenanthren-(8Z)-ylidene]-2-methyl-butyl ester

Guidance literature:

With pyridine; ammonium chloride; at 150 ℃; for 8h;

DOI:10.1016/S0040-4020(01)81873-1

Reference yield: 52.0%

Acetic acid (S)-4-[(2S,4aR,4bS,6aS,6bS,9aS,10aS,10bS)-2-(tert-butyl-diphenyl-silanyloxy)-4a,6a,7-trimethyl-2,3,4,4a,4b,5,6,6a,6b,9a,10,10a,10b,11-tetradecahydro-1H-9-oxa-pentaleno[2,1-a]phenanthren-8-yl]-2-methyl-butyl ester (151534-40-6) → (S)-5-Acetoxy-4-methyl-pentanoic acid (3S,8S,9S,10R,13S,14S,16S,17R)-17-acetyl-3-(tert-butyl-diphenyl-silanyloxy)-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-16-yl ester (151534-42-8)

Guidance literature:

With chromium(VI) oxide; In acetic acid; for 0.5h; Ambient temperature;

DOI:10.1016/S0040-4020(01)81873-1

Reference yield:

Acetic acid (S)-4-[(2S,4aR,4bS,6aS,6bS,9aS,10aS,10bS)-2-(tert-butyl-diphenyl-silanyloxy)-4a,6a,7-trimethyl-2,3,4,4a,4b,5,6,6a,6b,9a,10,10a,10b,11-tetradecahydro-1H-9-oxa-pentaleno[2,1-a]phenanthren-8-yl]-2-methyl-butyl ester (151534-40-6) → 3β-tert-butyldiphenylsilyloxy-16-dehydro-pregn-5-en-20-one (151534-43-9)

Guidance literature:

Multi-step reaction with 2 steps

1: 52 percent / CrO₃ / aq. acetic acid / 0.5 h / Ambient temperature

2: 15 percent / SiO₂

With chromium(VI) oxide; silica gel; In acetic acid;

DOI:10.1016/S0040-4020(01)81873-1

upstream raw materials:

acetic anhydride

3-tert-butyldiphenylsilyldiosgenin

Downstream raw materials:

(S)-5-Acetoxy-4-methyl-pentanoic acid (3S,8S,9S,10R,13S,14S,16S,17R)-17-acetyl-3-(tert-butyl-diphenyl-silanyloxy)-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-16-yl ester

3β-tert-butyldiphenylsilyloxy-16-dehydro-pregn-5-en-20-one

(3S,8S,9S,10R,13S,14S,16S,17R)-3-(tert-Butyl-diphenyl-silanyloxy)-17-((S)-1-hydroxy-1,5-dimethyl-hex-4-enyl)-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-16-ol

Acetic acid (3S,8S,9S,10R,13S,14S,16S,17R)-3-(tert-butyl-diphenyl-silanyloxy)-17-((S)-1-hydroxy-1,5-dimethyl-hex-4-enyl)-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-16-yl ester