Synthesis of alkyl glyco-pyranosides and -furanosides of 2-amino-2-deoxy-d-glucose. Crystal structure of 2-deoxy-2-[(4,4-dimethyl-2,6-dioxocyclohexylidenemethyl)amino]-α-d-glucopyranose
作者:Ma de Gracia García-Martín、Consolación Gasch、Antonio Gómez-Sánchez、Ma Jesus Diánez、Amparo López Castro
DOI:10.1016/0008-6215(87)80214-8
日期:1987.5
3-cyclohexanedione in MeOH in the presence of Et3N afforded 2-deoxy-2-[(4,4-dimethyl-2,6-dioxocyclohexylidenemethyl)amino]- d -glucose (6) in yields > 75%. Glycosidation of 6 with different alcohols (MeOH, CH2CHCH2OH, BnOH) under the Fischer conditions afforded mixtures of the corresponding alkyl 2-deoxy-2-[(4,4-dimethyl-2,6-dioxocyclohexylidenemethyl)-amino]-α,β- d -glucopyranoside and -α- d -glucofuranoside
摘要在Et3N存在下,2-氨基-2-脱氧-d-葡萄糖酸盐与5,5-二甲基-2-苯基氨基亚甲基-1,3-环己二酮在MeOH中的反应得到2-脱氧-2-[(4, 4-二甲基-2,6-二氧代环己叉基甲基)氨基] -d-葡萄糖(6)的产率> 75%。在费歇尔条件下用不同的醇(MeOH,CH2 = CH = CH2OH,BnOH)对6进行糖基化,得到相应的烷基2-脱氧-2-[(4,4-二甲基-2,6-二氧代环己叉基甲基)-氨基]的混合物-α,β-d-吡喃葡萄糖苷和-α-d-葡糖呋喃糖苷。除去N-保护基团得到高产率的游离氨基脱氧糖吡喃糖苷和-呋喃糖苷。除了其他已知的糖苷之外,还获得了烯丙基和苄基2-氨基-2-脱氧-α-d-吡喃葡萄糖苷和乙基和烯丙基2-氨基-2-脱氧-α-β-葡糖呋喃糖苷。X射线晶体学研究表明6