Abstract N.m.r. spectroscopic studies ( 1 H, 13 C) have shown that hydroxylamine and hydrazine react with 2,3- O -isopropylidene- d -ribofuranose ( 1 ) and d -ribose ( 2 ) to give primarily the acyclic oxime and hydrazone, respectively, whereas thiosemicarbazide affords mainly the cyclic pyranosyl and furanosyl derivatives. Acyclic or cyclic secondary amines, when condensed with either 1 or 2 , furnished
摘要Nmr光谱研究(1 H,13 C)表明
羟胺和
肼与2,3-O-异亚丙基-d-
呋喃核糖(1)和d-
核糖(2)反应分别主要生成无环
肟和,而
硫代
氨基
脲主要提供环状
吡喃糖基和
呋喃糖基衍
生物。无环或环状仲胺与1或2缩合时,仅提供β-
吡喃糖基和β-
呋喃基形式的混合物,在某些反应中还提供Amadori重排产物(2–30%)。