and carbon nucleophiles with 4-sulfonyl-hex-3-enopyranoside generate a range of C-3 amino- and C-3 branched-chain sugars, which are analogues of 3-amino-3,6-dideoxy sugars and 3-C-branched-chain-3,6-dideoxy sugars. The diastereoselectivity of addition reaction is nucleophile dependent; while both nitrogen and carbon nucleophiles added in cis-fashion, amines generated C3-C4 trans-diaxial products (gulo-derivatives)
胺和
碳亲核试剂与4-磺酰基-hex-3-enopyranoside的反应生成一系列C-3
氨基和C-3支链糖,它们是3-
氨基-3,6-二
脱氧糖和3的类似物-C-支链-3,6-二
脱氧糖。加成反应的非对映选择性取决于亲核试剂。
氮和
碳亲核试剂都以顺式方式添加时,胺生成C3-C4反双轴产物(古洛尔衍
生物),而
碳亲核试剂提供C3-C4跨硬脂化产物(葡萄
糖类似物)。