Further investigations on the chemistry of catharanthine have provided information, valuable in the estimation of reactivity and steric requirements of the skeleton. Specific hydroxylations at C(3), C(4) and C(18) have allowed the preparation of several derivatives including (3R, 4 R)-3-hydroxy-3, 4-dihydrocatharanthine (7); (3R,4 R)-3, 4-dihydroxycatharanthinic acid lactone (15); 18-decarbomethox
对黄hara鱼碱
化学的进一步研究提供了信息,对估计骨架的反应性和空间要求很有价值。在C(3),C(4)和C(18)处的特定羟基化反应允许制备几种衍
生物,包括(3R,4 R)-3-羟基-3,4-二氢
金刚烷胺(7); (3R,4R)-3,4-二羟基
金刚烷酸内酯(15);18-脱羰甲氧基-18-羟基
金刚烷胺(40)。