Synthesis and chemical behaviour of d-glucosyl esters of glutamic acid having the side-chain carboxyl group involved in the glycosidic linkage
作者:Dina Keglević、Jaroslav Horvat、Franjo Plavs̆ić
DOI:10.1016/s0008-6215(00)83547-8
日期:1976.3
similar treatment in the presence of trifluoroacetic acid afforded both anomers of 1-O-(L-gamma-glutamyl)-D-glucopyranose, which were characterized as trifluoroacetates (2alpha and 2beta) and converted into 2,3,4,6-tetra-O-acetyl-1-O-[1-methyl N-(acetyl)-L-glutam-5-oyl]-D-glucopyranose (4) which was also prepared by a definitive method. Hydrogenolysis of 5 gave both anomers of 1-O-[N-(tert-butyloxyc
已经研究了1-苄基N-苄氧基羰基-和N-叔丁氧基羰基-L-谷氨酸(分别为1和5)的完全苄基化的D-葡糖基酯的同时和逐步脱保护。1的催化加氢导致分子内氨解产生焦谷氨酸和D-葡萄糖,但在三氟乙酸存在下进行类似处理,得到1-O-(L-γ-谷氨酰基)-D-吡喃葡萄糖的两种异构体。三氟乙酸盐(2alpha和2beta),并转化为2,3,4,6-四-O-乙酰基-1-O- [1-甲基N-(乙酰基)-L-谷氨酸-5-酰基] -D-吡喃葡萄糖( 4)这也是通过确定的方法制备的。5的氢解得到1-O- [N-(叔丁氧基羰基)-L-γ-谷氨酰基] -D-吡喃葡萄糖的两种端基异构体(6),在三氟乙酸下于-10度处理,得到2alpha和2beta ,分别。通过将其转化为2,3,4,6-四-O-乙酰基-1-O- [1-甲基N-(叔丁氧羰基羰基)-L-谷氨酸-5-酰基]-β来确定6beta的结构。 -D-吡喃葡萄糖(7b