Regioselective one pot synthesis of 2-alkyl/aryl-4<i>h</i>-benzo[1,4] thiazine-3-one<i>via</i>microwave irradiation
作者:Sukanta Kamila、Benjamin Koh、Omair Khan、Hongming Zhang、Edward R. Biehl
DOI:10.1002/jhet.5570430632
日期:2006.11
A series of 2-alkyl/aryl-4H-benzo[1,4]thiazine-3-ones have been synthesized by microwave irradiation of ethyl-2-bromo-2-alkyl/aryl acetate and 2-amino thiophenol in the presence of 1,8-diazabicyclo-[5.4.0] undec-7-ene and N-methylpiperidine. All compounds were characterized by 1H NMR, 13C NMR and elemental analyses, and by X-ray crystallography in the case of 2-methyl-4H-benzo[1,4]thiazin-3-one.
在存在下,通过微波辐射乙基-2-溴-2-烷基/乙酸芳基酯和2-氨基苯硫酚合成了一系列2-烷基/芳基-4 H-苯并[1,4]噻嗪-3-酮1,8-二氮杂双环-[5.4.0]十一烷基-7-烯和N-甲基哌啶。对于2-甲基-4 H-苯并[1,4]噻嗪-3-酮,所有化合物的特征在于1 H NMR,13 C NMR和元素分析,以及X射线晶体学。