The spiroacetal [C(9)–C(20)] fragments of spirofungins A and B, antibiotics isolated from Streptomyces violaceusniger Tü 4113, were prepared from a known bromo alcohol derived from (S)-citronellal, using thermodynamically controlled iodolactonization and spiroacetalization as the key steps.
Synthesis of the spiroacetal parts of spirofungin A and B
作者:Yuko Shimizu、Hiromasa Kiyota、Takayuki Oritani
DOI:10.1016/s0040-4039(00)00371-3
日期:2000.4
The C9-C20 spiroacetal parts of spirofungin A and B, antifungal antibiotics from Strephomyces violaceusniger Tu 4113, were synthesized simultaneously from (S)-citronellyl bromide and (+/-)-epoxy alcohol via alkyne-lactone coupling reaction and diastereomeric separation. (C) 2000 Elsevier Science Ltd. All rights reserved.