Synthesis of potential anticancer agents. Pyrido[4,3-b][1,4]oxazines and pyrido[4,3-b][1,4]thiazines
作者:Carroll Temple、Glynn P. Wheeler、Robert N. Comber、Robert D. Elliott、John A. Montgomery
DOI:10.1021/jm00365a012
日期:1983.11
Hydrolysis of the chloro group of ethyl (6-amino-4-chloro-5-nitropyridin-2-yl)carbamate (3) with formic acid gave the corresponding 4-hydroxypyridine 4. Catalytic hydrogenation of the nitro group of 4 gave the 5-amino-4-hydroxypyridine 5, which was reacted with alpha-halo ketones in acetic acid at room temperature to give a series of 3- and 2,3-substituted ethyl (5-amino-2H-pyrido[4,3-b][1,4]oxazin-7-yl)carbamates
(6-氨基-4-氯-5-硝基吡啶-2-基氨基甲酸乙酯)(3)的甲酸与甲酸的水解,得到相应的4-羟基吡啶4。4的硝基的催化氢化得到5 -氨基-4-羟基吡啶5,在室温下与α-卤代酮在乙酸中反应,得到一系列3-和2,3-取代的乙基(5-氨基-2H-吡啶[4,3-b ] [1,4]恶嗪-7-基)氨基甲酸酯8.用热的浓盐酸处理8,再生吡啶合成子5.在3与硫代乙酸酯的反应中,产物进行水解和空气氧化,得到相应的二硫键6.同时还原6的硝基和二硫键得到5-氨基-4-巯基吡啶7将其与α-卤代酮在室温下于乙酸中或在乙醇和水的混合物中在回流下反应,得到一系列3-,2,3-和2,2,3-取代的乙基(5-氨基-2H-吡啶并[4,3-b] [1,4]噻嗪-7-基)氨基甲酸酯9.这些吡啶并恶嗪和吡啶并噻嗪对培养的L1210细胞增殖和有丝分裂指数以及小鼠存活的影响确定患有P388白血病。