The first synthesis of the aglycone of the potent anti-tumor steroidal saponin OSW-1
摘要:
The protected aglycone (21e-beta) of the potent anti-tumor agent OSW-1 (1) was synthesized in 9 steps from 5-androsten-3 beta-ol-17-one (10) in 55% overall yield. Key reactions involve ene installation of the side chain, regio and stereoselective dihydroxylation and diastereoselective reduction of the C16 ketone. (C) 1998 Elsevier Science Ltd. All rights reserved.
The first synthesis of the aglycone of the potent anti-tumor steroidal saponin OSW-1
摘要:
The protected aglycone (21e-beta) of the potent anti-tumor agent OSW-1 (1) was synthesized in 9 steps from 5-androsten-3 beta-ol-17-one (10) in 55% overall yield. Key reactions involve ene installation of the side chain, regio and stereoselective dihydroxylation and diastereoselective reduction of the C16 ketone. (C) 1998 Elsevier Science Ltd. All rights reserved.