Synthesis of various secosteroidal macrocycles by ring-closing metathesis
摘要:
We set out to describe an efficient and versatile method for preparing secosteroidal macrocycles from cholic acid, via an oxidative ring-expansion/ring-opening sequence and a ring-closing metathesis reaction as the key steps. The characteristic H-1 and C-13 NMR spectroscopic features of the synthesized compounds are reported. (C) 2013 Elsevier Ltd. All rights reserved.