Simple syntheses of 1,3-dialkylpyrrolo- and furopyrimidines.
作者:NORIO KAWAHARA、TAKAKO NAKAJIMA、TSUNEO ITOH、HARUO OGURA
DOI:10.1248/cpb.33.4740
日期:——
Simple and efficient syntheses of 7-deazacaffeines, 9-deazatheophyllines, furo [2, 3-d] pyrimidines and furo [3, 2-d] pyrimidines from 5- or 6-substituted pyrimidines by means of intramolecular cyclization reactions are described.
通过分子内环化反应,从5-或6-取代嘧啶出发,简便高效地合成了7-脱氮咖啡因、9-脱氮茶碱、呋喃[2, 3-d]嘧啶和呋喃[3, 2-d]嘧啶。