Studies on Synthesis of Coumarin Derivatives. XVI. On the Preparation of N-Substituted-pyranobenzoxazole-carboxamides
作者:Haruo Saikachi、Masataka Ichikawa
DOI:10.1248/cpb.14.1167
日期:——
N-Substituted-2-methyl-7-oxo-7H-pyrano [3, 2-e] -, -6-oxo-6H-pyrano [2, 3-f]- and -8-oxo-8H-pyrano [3, 2-g]-benzoxazole-8-, -7-and-7-carboxamide were prepared by fusing ethyl pyranobenzoxazolecarboxylate series with primary amines, separately. Aniline, 2-aminopyrimidine, 6-amino-2, 4-dimethylpyrimidine, 2-aminopyridine, and 2-amino-5-bromopyrimidine were used for the fusing reaction as primary amines.
N-取代的-2-甲基-7-氧代-7H-
吡喃并[3, 2-e]-、-6-氧代-6H-
吡喃并[2, 3-f]-和-8-氧代-8H-
吡喃并[3, 2-g]-
苯并恶唑-8-、-7-和-7-甲酰胺分别由
吡喃
苯并恶唑羧酸乙酯系列与
伯胺融合制备而成。
苯胺、2-
氨基嘧啶、6-
氨基-2, 4-二
甲基嘧啶、2-
氨基吡啶和 2-
氨基-5-
溴嘧啶作为
伯胺用于熔合反应。