Synthesis of 6-thia analogs of the natural neurosteroid allopregnanolone
摘要:
A procedure is described for the preparation of 6-thiapregnanes in five steps from pregnenolone via a 5-oxo-7-iodo-secopregnane intermediate. The 6-thiasteroid obtained was converted into 6-thia-allopregnanolone and its sulfoxide and sulforic derivatives. The trans stereochemistry at the A/B ring junction was accomplished by stereoselective reduction of an intermediate hemithioketal with triethylsilane/BF3 center dot Et2O. The compounds synthesized are analogs of natural neurosteroids, and exhibited GABA(A) receptor activity comparable to allopregnanolone. (c) 2006 Elsevier Ltd. All rights reserved.
Synthesis of 6-thia analogs of the natural neurosteroid allopregnanolone
摘要:
A procedure is described for the preparation of 6-thiapregnanes in five steps from pregnenolone via a 5-oxo-7-iodo-secopregnane intermediate. The 6-thiasteroid obtained was converted into 6-thia-allopregnanolone and its sulfoxide and sulforic derivatives. The trans stereochemistry at the A/B ring junction was accomplished by stereoselective reduction of an intermediate hemithioketal with triethylsilane/BF3 center dot Et2O. The compounds synthesized are analogs of natural neurosteroids, and exhibited GABA(A) receptor activity comparable to allopregnanolone. (c) 2006 Elsevier Ltd. All rights reserved.
Synthesis of 6-thia analogs of the natural neurosteroid allopregnanolone
作者:Fernando J. Durán、Alberto A. Ghini、Hector Coirini、Gerardo Burton
DOI:10.1016/j.tet.2006.03.025
日期:2006.5
A procedure is described for the preparation of 6-thiapregnanes in five steps from pregnenolone via a 5-oxo-7-iodo-secopregnane intermediate. The 6-thiasteroid obtained was converted into 6-thia-allopregnanolone and its sulfoxide and sulforic derivatives. The trans stereochemistry at the A/B ring junction was accomplished by stereoselective reduction of an intermediate hemithioketal with triethylsilane/BF3 center dot Et2O. The compounds synthesized are analogs of natural neurosteroids, and exhibited GABA(A) receptor activity comparable to allopregnanolone. (c) 2006 Elsevier Ltd. All rights reserved.