Synthesis and photolysis of azido-benzo[b]thiophens, -benzothiazoles, -benzimidazoles, and -indazoles: novel 6,7-diamino-benzothiazoles, -benzimidazoles, and -indazoles and 6-diethylamino-8H-thiazolo [5,4-c]azepines
作者:Peter T. Gallagher、Brian Iddon、Hans Suschitzky
DOI:10.1039/p19800002362
日期:——
an excess of a secondary amine gave either the corresponding 6,7-diaminobenzothiazole (14)–(20), a 6-amino-8H-thiazolo[5,4-c]azepine (21)–(24), a mixture of both, or intractable material [as in the case of azide (9)]. Irradiation of 7-azido-3-methylbenzo[b]thiophen in an excess of diethylamine gave 7-amino-3-methylbenzo[b]thiophen and a trace of 3,3′-dimethyl-7,7′-azobenzo[b]thiophen. 6-Azidoindazole
在过量仲胺存在下照射6-叠氮基苯并噻唑(4)-(9)(参见方案),得到相应的6,7-二氨基苯并噻唑(14)-(20),即6-氨基-8 H-噻唑并[5,4- c ]氮杂(21)-(24),两者的混合物或难处理的物质[如叠氮化物(9)的情况]。7-叠氮基-3-甲基苯并[照射b ]在过量的二乙胺的噻吩,得到7-氨基-3-甲基苯并[ b ]噻吩和3,3'-二甲基-7,7'- azobenzo痕量[ b]噻吩。6-叠氮基吲唑生成7-氨基-6-二乙基氨基吲唑(32)和5(6)-叠氮基苯并咪唑生成4(7)-氨基-5(6)-二乙基氨基苯并咪唑(33)和5(6)-氨基-4的混合物(7)-二乙氨基苯并咪唑(34)。将6-叠氮基苯并噻唑或其2-甲基衍生物在甲醇氧化物甲醇-二恶烷混合物中进行光解,分别得到相应的6-甲氧基-8 H-噻唑并[5,4- c ] a庚因,分别为(30)或(31)。