A facile synthesis of new thieno[2,3-b][1,4]thiazine derivatives starting from 2-acylamino-3,3-dichloroacrylonitriles
作者:Sergey V. Popil'nichenko、Vladimir S. Brovarets、Alexander N. Chernega、Denis V. Poltorak、Boris S. Drach
DOI:10.1002/hc.20232
日期:——
Readily available 2-acylamino-3,3-dichloroacrylonitriles are sequentially treated with methyl mercaptoacetate in the presence of sodium methylate and with sulfuric acid to furnish the methyl ester of 7-amino-2-oxo-3H-thieno[2,3-b][1,4]thiazine-6-carboxylic acid. Treating it first with triethyl orthoformate and then with ammonia or primary amines, the pyrimidine-4-one nucleus is annelated to the thienothiazine
在甲醇钠和硫酸的存在下,容易获得的 2-酰基氨基-3,3-二氯丙烯腈依次用巯基乙酸甲酯处理,得到 7-氨基-2-氧代-3H-噻吩并[2,3-b 的甲酯][1,4]噻嗪-6-羧酸。首先用原甲酸三乙酯处理,然后用氨或伯胺处理,嘧啶-4-one 核与噻吩噻嗪系统退火,光谱方法和 X 射线衍射分析证实了这一点。© 2006 Wiley Periodicals, Inc. 杂原子化学 17:411–415, 2006; 在线发表于 Wiley InterScience (www.interscience.wiley.com)。DOI 10.1002/hc.20232