Synthetic investigations of rapamycin. 2. Synthesis of a C(22)-C(42) fragment
摘要:
A concise, modular synthesis of a protected C22-C42 segment of rapamycin is reported including as key coupling steps a vinyllithium addition to a Weinreb amide (5 + 6 --> 24) and a nucleophilic epoxide opening with an alpha-lithio sulfone mediated by BF3.OEt2 (4 + 27 --> 28).
Synthetic investigations of rapamycin. 2. Synthesis of a C(22)-C(42) fragment
摘要:
A concise, modular synthesis of a protected C22-C42 segment of rapamycin is reported including as key coupling steps a vinyllithium addition to a Weinreb amide (5 + 6 --> 24) and a nucleophilic epoxide opening with an alpha-lithio sulfone mediated by BF3.OEt2 (4 + 27 --> 28).
Synthetic investigations of rapamycin. 2. Synthesis of a C(22)-C(42) fragment
作者:Daniel Romo、Donna D. Johnson、Louis Plamondon、Tetsuo Miwa、Stuart L. Schreiber
DOI:10.1021/jo00045a008
日期:1992.9
A concise, modular synthesis of a protected C22-C42 segment of rapamycin is reported including as key coupling steps a vinyllithium addition to a Weinreb amide (5 + 6 --> 24) and a nucleophilic epoxide opening with an alpha-lithio sulfone mediated by BF3.OEt2 (4 + 27 --> 28).