Synthesis of some 3-alkoxycarbonyl-3-C-cyano-3-deoxyglycosides by the reaction of 1,5-dialdehydes with cyanoesters
作者:Francisco Santoyo Gonzalez、Fernando Hernandez Mateo、Fidel J. Lopez Aparicio
DOI:10.1016/0008-6215(89)85017-7
日期:1989.12
(12) and -α- l -xylo-pentopyranosides (13), and methyl 4-O-acetyl-3-tert-butoxycarbonyl-2-(1-tert-butoxycarbonyl-1-cyanomethyl)-3-C-cyano-2,3-dideoxy-β- d -xylo-pentopyranoside (14) were also isolated in the reaction of 1 with tert-butyl cyanoacetate followed by acetylation. Isomerizations were observed in the acetylation of 6 and 7, yielding methyl 2,4-di-O-acetyl-3-tert-butoxycarbonyl-3-C-cyano-3-deoxy-β-
摘要α-(R)-甲氧基二甘醇醛(1)与氰基乙酸乙酯和叔丁基乙酸酯反应生成甲基2,4-二-O-乙酰基-3-C-氰基-3-脱氧-3-乙氧基羰基-β-d -xylo-(4)和-α-1-xylo-pentopyranosides(5)(作为乙酰基衍生物分离),以及3-叔丁氧羰基羰基-3-C-氰基-3-脱氧-β-d -xylo-( 6)和-α-l-木基戊吡喃糖苷(7)(分别为1:1的加成产物)(主要产物)。次要1:2加成产物甲基2-O-乙酰基-3-叔丁氧基羰基-4-(1-叔丁氧基羰基-1-氰基甲基)-3-C-氰基-3,4-二脱氧-α-1- lyxo-(12)和-α-1-xylo-pentopyranosides(13)和甲基4-O-乙酰基-3-叔丁氧基羰基-2-(1-叔丁氧基羰基-1-氰基甲基)-3-C-在1与氰基乙酸叔丁酯的反应中,然后进行乙酰化反应,还分离出了氰基-2,3-二脱氧-β-d-木基戊