Enantiospecific synthesis of polyhydroxylated indolizidines related to castanospermine:1 1-deoxy-castanospermine.
作者:David Hendry、Leslie Hough、Anthony C. Richardson
DOI:10.1016/s0040-4020(01)89804-5
日期:1988.1
Enantiospecific synthesis of (6S,7R,8R,8aR)-6,7,8- trihydroxyindolizidine ( 1-deoxy-castanospermine ) (3) is described from readily available D-glucose, where the key step involves oxidative bromination of a benzylidene acetal to afford 8-azido-3-o-benzoyl-5-bromo-5,6,7,8-tetradeoxy-1,2-o-isopropylidene-β-L-ido-octose (16). The synthetic indolizidine (3) was tested against a range of glycosidases.
(6S,7R,8R,8aR)-6,7,8-三羟基吲哚并咪唑(1-脱氧-castanospermine)(3)的对映体特异性合成描述于现成的D-葡萄糖,其中关键步骤涉及亚苄基乙缩醛的氧化溴化得到8-叠氮基-3-邻-苯甲酰基-5-溴-5,6,7,8-四脱氧-1,2-邻-异亚丙基-β-L-氨基八糖(16)。针对一系列糖苷酶测试了合成的吲哚izidine(3)。