作者:Peter E. Maligres、Marjorie S. Waters、Steven A. Weissman、J. Christopher McWilliams、Stephanie Lewis、Jennifer Cowen、Robert A. Reamer、R. P. Volante、Paul J. Reider、David Askin
DOI:10.1002/jhet.5570400206
日期:2003.3
The 1,5-disubstituted imidazole system was regioselectively assembled via an improved Marckwald imidazole synthesis. A new imidazole dethionation procedure has been developed to convert the Marckwald mercaptoim-idazole product to the desired imidazole. This methodology was found to be tolerant of a variety of functional groups providing good to excellent yields of 1,5-disubstituted imidazoles. A new
ras法呢基蛋白转移酶抑制剂1的合成以多千克为单位进行了描述。反合成分析表明,氯甲基咪唑2和哌嗪酮3是可行的前体。1,5-二取代的咪唑系统是通过改进的Marckwald咪唑合成进行区域选择性组装的。已经开发了一种新的咪唑脱硫方法,以将Marckwald巯基咪唑-咪唑产品转化为所需的咪唑。发现该方法耐受各种官能团,从而提供良好至极好的1,5-二取代的咪唑收率。开发了一种新的Mitsunobu环化策略以制备芳基哌嗪酮片段3。