Several 4-aryl-4H-1,4-benzothiazine 1,1-dioxide derivatives have been prepared in good yields by microwave promoted cyclisation of α-phenylsulfonyl-enaminoacrylate intermediates in basic media. Benzothiazines were obtained without the use of a catalyst in short reaction times.
通过在碱性介质中微波促进α-苯基磺酰基-烯
氨基
丙烯酸酯中间体的环化反应,已经以高收率制备了几种4-芳基-4H-1,4-苯并
噻嗪1,1-二氧化物衍
生物。在短的反应时间内不使用催化剂而获得苯并
噻嗪。