Synthesis of the 11β-hydroxymethyl-androst-4-en-3,17-dione
摘要:
The 11 beta-hydroxymethyl-androst-4-en-3,17-dione 5 was prepared within five synthetic steps starting from the commercially available adrenosterone with an overall yield of 24%. The 11-ketosteroid 1 was subjected to a Peterson methylenation. The subsequent hydroboration/oxidation sequence in position 11 was regio- and stereoselectively conducted using the borane-methyl sulfide complex at 0 degrees C. The target molecule was then obtained by deprotection using in situ generated TMSI. (c) 2006 Elsevier Ltd. All rights reserved.
Synthesis of the 11β-hydroxymethyl-androst-4-en-3,17-dione
摘要:
The 11 beta-hydroxymethyl-androst-4-en-3,17-dione 5 was prepared within five synthetic steps starting from the commercially available adrenosterone with an overall yield of 24%. The 11-ketosteroid 1 was subjected to a Peterson methylenation. The subsequent hydroboration/oxidation sequence in position 11 was regio- and stereoselectively conducted using the borane-methyl sulfide complex at 0 degrees C. The target molecule was then obtained by deprotection using in situ generated TMSI. (c) 2006 Elsevier Ltd. All rights reserved.
The 11 beta-hydroxymethyl-androst-4-en-3,17-dione 5 was prepared within five synthetic steps starting from the commercially available adrenosterone with an overall yield of 24%. The 11-ketosteroid 1 was subjected to a Peterson methylenation. The subsequent hydroboration/oxidation sequence in position 11 was regio- and stereoselectively conducted using the borane-methyl sulfide complex at 0 degrees C. The target molecule was then obtained by deprotection using in situ generated TMSI. (c) 2006 Elsevier Ltd. All rights reserved.