Unexpected Formation of Benzothiazoles in the Synthesis of New Heterocycles: Benzo-1,2,4-dithiazines
作者:Dagmar Fajkusova、Pavel Pazdera
DOI:10.1055/s-2008-1067008
日期:2008.4
sulfur-sulfur bond formation. 2-Aminothiophenol, when allowed to react with isothiocyanates, provided benzothiazoles. 2,2'-Diaminodiphenyl disulfide underwent cyclizations very readily without any reducing agent to give, according to the reaction conditions, benzothiazoles or benzo-1,2,4-dithiazines. The developed proceduře offers a simple and convenient way to prepare the title compounds in very good to
假设可逆硫-硫键形成,研究了苯并-1,2,4-二噻嗪的合成。2-氨基苯硫酚,当允许与异硫氰酸酯反应时,提供苯并噻唑。根据反应条件,2,2'-二氨基二苯基二硫化物在没有任何还原剂的情况下很容易发生环化反应,得到苯并噻唑或苯并-1,2,4-二噻嗪。开发的程序提供了一种简单方便的方法来制备标题化合物,产率非常高。直到现在,苯并-1,2,4-二噻嗪以及带有氨基硫代羰基的 2,2'-二氨基二苯基二硫化物还是未知的。