The n.m.r. data for several derivatives of taxicin-I, particularly for oxonortaxicin-I tetra-acetate, the spectrum of which is considered in some detail, define substantial parts of the structures. Further structural information was obtained from the preparation and examination of 1,2-, 4,5-, and 9,10-seco-taxicin-I derivatives, and also from reactions involving the hydrogenolysis of oxygen functions
运载体蛋白-I的几种衍
生物的nmr数据,特别是
氧代轮霉素-I-
四乙酸酯的nmr数据定义了结构的实质部分,其光谱被认为是较为详细的。通过制备和检查1,2-,4,5-和9,10-半胱
氨酸-1衍
生物的结构信息,以及涉及位置5和10的
氧官能团
氢解反应的反应,都可以得到更多的结构信息。衍
生物(IX; R = Ac,R'= Me)中的共轭体系以显示其简单的αβ-不饱和
酮性质的方式逐步还原;这些实验的一个特点是显着的光吸收λmax。约。对于非共轭
烯烃(XIII),发现为225 m µ。