The present invention discloses novel benziso-N(L-histidine methylester)-thiazolone compound of the formula 3 useful as a RNA polymerase inhibitor. These compounds are prepared by generating the free amine of the histidine methylester in situ by the addition of triethylamine to an ice cooled and stirred suspension of histidine methylester dihydrochloride in dry dichloromethane, adding dropwise, a dichloromethane solution of dithiodibenzoyl chloride and triethylamine to the said free amine at a temperature in the range of 0-5° C. to room temperature, stirring the reaction mixture for about 48 h, washing said reaction mixture with cold saturated NaHCO3, subjecting it to a conventional organic-layer drying , followed by evaporating the solvent in vacuo, and eluting by chromatography the residue benziso-N(L-histidine methylester)-thiazolone.
本发明揭示了一种新型的化合物,其
化学式为3,为RNA聚合酶
抑制剂。这些化合物通过在干的
二氯甲烷中将
L-组氨酸甲基酯二盐酸盐悬浮液加入
三乙胺,生成组
氨酸甲基酯的游离胺基,然后在0-5℃至室温范围内滴加二
硫苯甲酰氯和
三乙胺的
二氯甲烷溶液到该游离胺基中,搅拌反应混合物约48小时,用冷饱和NaHCO3洗涤反应混合物,进行常规有机层干燥,随后在真空下蒸发溶剂,并通过色谱法洗脱残留的苯并
异噁唑-N(
L-组氨酸甲基酯)化合物。