Synthesis of Functionalized Diarylmethanes via a Copper-Catalyzed Cross-Coupling of Arylmagnesium Reagents with Benzylic Phosphates
作者:Christiane C. Kofink、Paul Knochel
DOI:10.1021/ol0616790
日期:2006.8.1
A combination of copper chloride, triethyl phosphite, and tetrabutylammonium iodide is a very efficient catalytic system for the synthesis of polyfunctionalized diarylmethanes, using the cross-coupling reaction of arylmagnesium halides with benzylic phosphates. The antibiotic Trimethoprim has been prepared using this Cu(I)-catalyzed cross-coupling in 52% overall yield (four steps).
氯化铜,亚磷酸三乙酯和碘化四丁基铵的组合是使用芳基卤化镁与磷酸苄基酯的交叉偶联反应合成多官能化二芳基甲烷的非常有效的催化体系。使用这种Cu(I)催化的交叉偶联制备了甲氧苄氨嘧啶,总收率为52%(四个步骤)。