作者:Y. Maki、T. Hiramitsu、M. Suzuki
DOI:10.1016/0040-4020(80)80097-4
日期:1980.1
5]benzothiazepine 10 was obtained in high yield by the Smiles rearrangement of 6, trapping of the resulting thiolate ion with formalin and subsequent acid-catalysed cyclization. Treatment of 1,3-dimethyl-6-(2-aminophenylthio)uracil 5 with hot acetic acid gave 1,3-bis[(2-benzothiazolyl)acetyl]-1,3-dimethylurea 12. Upon heating 5 or N-acetyl derivative 6 in dimethylsulfoxide, 5-thiaisoalloxazine 3 was obtained
1,3-二甲基-6-(2-乙酰氨基苯硫基)尿嘧啶6与苛性碱反应,然后甲基化,得到1,3-二甲基-6-(2-甲基硫代苯胺基)尿嘧啶7与1,3-二甲基-5-5乙酰基-6-(2-甲基硫代苯胺基)尿嘧啶8。通过6的Smiles重排,用福尔马林捕获所得的硫醇根离子并随后进行酸催化的环化反应,可以高产率获得嘧啶基[1,5]苯并噻氮平10。用热乙酸处理1,3-二甲基-6-(2-氨基苯硫基)尿嘧啶5得到1,3-双[(2-苯并噻唑基)乙酰基] -1,3-二甲基脲12。加热时5或N-乙酰基衍生物6在二甲基亚砜中,以中等收率获得了5-硫代异恶嗪3。讨论了观察到的反应的机理。