physalin B 在
乙酸铵 、 甲烷 作用下,
以
甲醇 为溶剂,
反应 17.5h,
以112 mg的产率得到25-hydroxyphysalin B
参考文献:
名称:
Activated charcoal-mediated hydroxylation under very mild conditions: conversion of physalin B into 25-hydroxyphysalin B
摘要:
Activated charcoal treatment of physalin B, a 13, 14-seco-16,24-cyclosteroidal constituent of Physalis alkekengi, in MeOH at room temperature yields a product possessing a hydroxy group at the α-position of the δ-lactone carbonyl function, namely 25-hydroxyphysalin B, in high yield.