作者:Hermann Lutz、Wolfgang Pfleiderer
DOI:10.1016/0008-6215(84)85279-9
日期:1984.7
conditions led to selective 2,2′-cyclization but no products possessing the less favored 4,2′-structure were obtained. The best yields of 2,2′-anhydro-3-β- d -arabinofuranosyllumazines were obtained from 3-(2,3- O -carbonyl-5- O -trityl-β- d -ribofuranosyl)lumazines in an imidazole-catalyzed reaction at elevated temperatures. Base hydrolysis of the 2,2′-bond allowed the synthesis of 3-β- d -arabinofuranosyllumazines
摘要研究了3-β-d-核呋喃呋喃糖基鲁嗪及其6,7-二甲基和二苯基衍生物与糖苷配基的相邻羰基形成脱水核苷的反应。各种条件导致选择性的2,2'-环化,但未获得具有较不受欢迎的4,2'-结构的产物。在咪唑催化下,由3-(2,3- O-羰基-5-O-三苯甲基-β-d-呋喃呋喃糖基)lumazines获得2,2'-脱水-3-β-d-阿拉伯呋喃糖基lumazines的最佳收率在高温下反应。2,2′-键的碱水解允许合成3-β-d-阿拉伯呋喃糖基lumazines。