Oxidative halogenation of substituted pyrroles with Cu(II). Part<b>IV.</b>Bromination of 2-(2′-hydroxybenzoyl)pyrrole. A new synthesis of bioactive analogs of monodeoxypyoluteorin
作者:Salvatore Petruso、Silvana Bonanno、Sergio Caronna、Maurizio Ciofalo、Benedetta Maggio、Domenico Schillaci
DOI:10.1002/jhet.5570310442
日期:1994.7
The selective bromination with copper(II) bromide of the pyrrole ring in 2-(2′-hydroxybenzoyl)pyrrole II in the heterogeneous phase is described giving in almost quantitative yield the 4,5-dibromo derivative VI. The subsequent introduction of halogen into the phenol moiety was observed when the reaction was performed in the homogeneous phase with an excess of halogenating agent. The pentabromo derivative
描述了在异相中用2-(2'-羟基苯甲酰基)吡咯II中的吡咯环的溴化铜(II)选择性溴化,得到几乎定量的4,5-二溴衍生物VI。当在均相中与过量的卤化剂进行反应时,观察到随后将卤素引入酚部分。通过彻底溴化标题化合物,获得了对金黄色葡萄球菌非常有活性的化合物五溴衍生物IX(mic = 17 nmoles / dm -3)。II的氯代衍生物收率低 通过母体化合物与氯化铜(II)的反应获得。