2-{(S)-1-[(3S,8R,9S,10R,13S,14S,15R)-3-(tert-Butyl-dimethyl-silanyloxy)-15-hydroxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl]-ethyl}-5-methyl-3-oxo-hexanoic acid methyl ester

Base Information

• Chemical Name: 2-{(S)-1-[(3S,8R,9S,10R,13S,14S,15R)-3-(tert-Butyl-dimethyl-silanyloxy)-15-hydroxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl]-ethyl}-5-methyl-3-oxo-hexanoic acid methyl ester
• CAS No.: 104530-11-2
• Molecular Formula: C₃₅H₅₈O₅Si
• Molecular Weight: 586.928
• Mol file: 104530-11-2.mol

Synonyms:2-{(S)-1-[(3S,8R,9S,10R,13S,14S,15R)-3-(tert-Butyl-dimethyl-silanyloxy)-15-hydroxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl]-ethyl}-5-methyl-3-oxo-hexanoic acid methyl ester

Chemical Property of 2-{(S)-1-[(3S,8R,9S,10R,13S,14S,15R)-3-(tert-Butyl-dimethyl-silanyloxy)-15-hydroxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl]-ethyl}-5-methyl-3-oxo-hexanoic acid methyl ester

Chemical Property:

Purity/Quality:

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

Useful:

Technology Process of 2-{(S)-1-[(3S,8R,9S,10R,13S,14S,15R)-3-(tert-Butyl-dimethyl-silanyloxy)-15-hydroxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl]-ethyl}-5-methyl-3-oxo-hexanoic acid methyl ester

There total 2 articles about 2-{(S)-1-[(3S,8R,9S,10R,13S,14S,15R)-3-(tert-Butyl-dimethyl-silanyloxy)-15-hydroxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl]-ethyl}-5-methyl-3-oxo-hexanoic acid methyl 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: 91.0%

methyl 5-methyl-3-oxohexanoate (30414-55-2) + (17E)-3β-(dimethyl-t-butylsilyloxy)-15β,16β-epoxypregna-5,17(20)-diene (78424-47-2) → 2-{(S)-1-[(3S,8R,9S,10R,13S,14S,15R)-3-(tert-Butyl-dimethyl-silanyloxy)-15-hydroxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl]-ethyl}-5-methyl-3-oxo-hexanoic acid methyl ester (104530-11-2)

Guidance literature:

With bicyclic phosphite; Pd₃(TBAA)3xCHCl₃; In tetrahydrofuran; for 2h; Ambient temperature;

DOI:10.1016/S0040-4020(01)91412-7

Reference yield:

methyl 5-methyl-3-oxohexanoate (30414-55-2) + tert-Butyl-[(3S,10R,13S,15S,16R)-17-eth-(E)-ylidene-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-20-oxa-cyclopropa[15,16]cyclopenta[a]phenanthren-3-yloxy]-dimethyl-silane (78424-47-2) → 2-{(S)-1-[(3S,10R,13S,15R)-3-(tert-Butyl-dimethyl-silanyloxy)-15-hydroxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl]-ethyl}-5-methyl-3-oxo-hexanoic acid methyl ester (91708-64-4,91708-65-5,104530-11-2)

Guidance literature:

With C₆H₁₁O₃P; Mechanism; 1.) Pd₃(TBAA)3CHCl₃, THF, 30 min, RT, 2.) THF, 2 h, RT;

DOI:10.1016/S0040-4039(01)90076-0

upstream raw materials:

methyl 5-methyl-3-oxohexanoate

tert-Butyl-[(3S,10R,13S,15S,16R)-17-eth-(E)-ylidene-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-20-oxa-cyclopropa[15,16]cyclopenta[a]phenanthren-3-yloxy]-dimethyl-silane

(17E)-3β-(dimethyl-t-butylsilyloxy)-15β,16β-epoxypregna-5,17(20)-diene