these products led to 2″,3″-unsaturated trisaccharide derivatives containing a 2,3-unsaturated α- erythro unit. cis -Hydroxylation of the double bond in five of these unsaturated compounds gave rhamnotriose derivatives, two of which were deprotected to give the trisaccharides α- l -Rha p -(1→2)-α- l -Rha p -(1→3)- l -Rha p and α- d -Rha p -(1→2)-α- l -Rha p -(1→3)- l -Rha p , respectively.
摘要将部分保护的
鼠李糖二糖衍
生物与1- O-乙酰基-2,3,6-三苯氧基-α,β-dl-
甘油-hex-2-enopyranos-4-ulose缩合可得到非对映异构体α-连接的三糖衍
生物,配置是根据光谱和
化学数据分配的。这些产物中羰基的还原导致含有2,3-不饱和α-赤型单元的2”,3”-不饱和三糖衍
生物。这些不饱和化合物中的五个中的双键进行顺式-羟基氧化反应得到
鼠李糖三糖衍
生物,其中两个被脱保护得到三糖α-1-Rha p-(1→2)-α-1-Rha p-(1→3) )-l -Rha p和α-d -Rha p-(1→2)-α-l-Rha p-(1→3)-1 -Rha p。