Novel Regio- and Stereoselective Synthesis of 6-Substituted Pteridines and Naturally Occurring L-<i>erythro</i>-Biopterin
作者:Shizuaki Murata、Takashi Sugimoto、Shoji Ogiwara、Kouichi Mogi、Hiroaki Wasada
DOI:10.1055/s-1992-26097
日期:——
Condensation of 2,4,5-triamino-6-butoxypyrimidine with various 2-formyloxiranes followed by oxidation with iodine affords 2-amino-4-butoxy-6-(1-hydroxyalkyl)pteridines regioselectively. Naturally occurring L-erythro-biopterin is synthesized from (1S,2S,3S)-2-formyl-3-(1-hydroxyethyl) oxirane. The reaction proceeds via 5,6-dihydropteridine, and the mechanism is discussed with the help of molecular orbital calculations.
通过2,4,5-三氨基-6-丁氧基嘧啶与多种2-甲酰氧基环氧乙烷的缩合反应,接着用碘氧化,可以选择性地合成2-氨基-4-丁氧基-6-(1-羟基烷基)蝶啶。从(1S,2S,3S)-2-甲酰基-3-(1-羟基乙基)环氧乙烷合成自然界存在的L-赤型二氢蝶呤。反应过程经过5,6-二氢蝶呤中间体,并通过分子轨道计算讨论了反应机制。