作者:Yoshito Kihara、Shigeru Kabashima、Kazue Uno、Tadashi Okawara、Tetsuo Yamasaki、Mitsuru Furukawa
DOI:10.1055/s-1990-27081
日期:——
The reactions of amidinothioureas, imidoylthioureas, thioacylamidines, O-methyl-1-aryl-2-thioisobiurets, and 1-aryl-isodithiobiurets with diethyl azodicarboxylate (DEAD, diethyl diazenedicarboxylate) gave the corresponding thiadiazoles by the oxidative cyclic S-N bond formation. Analogously, the oxidative cyclization of 2-phenyl-5-(1-methylthiosemicarbazido)-3(2H)-pyridazinones with DEAD provided 4-methyl-7-phenyl-4H-pyridazino[4,5-e] [1,3,4]-thiadiazin-8(7H)-ones.
氨基硫脲、亚氨基硫脲、硫酰胺、O-甲基-1-芳基-2-硫异丁脲和1-芳基-异双硫脲与二乙基二噻吡啶二羧酸酯(DEAD,二乙基二氮二羧酸酯)的反应通过氧化环状S-N键形成生成了相应的噻二唑。类似地,2-苯基-5-(1-甲基硫半肼基)-3(2H)-吡啶嗪酮与DEAD的氧化环化反应生成了4-甲基-7-苯基-4H-吡啶嗪[4,5-e][1,3,4]-噻二嗪-8(7H)-酮。