作者:Fabian M. Piller、Paul Knochel
DOI:10.1021/ol802513q
日期:2009.1.15
A full functionalization of all four positions of the thiophene ring was achieved. Starting from readily available 2,5-dichlorothiophene, successive magnesiations of the 3- and 4-positions using TMPMgCl·LiCl furnish, after trapping with various electrophiles, 3,4-difunctionalized dichlorothiophenes. Subsequent dechlorination and metalation or magnesium insertion into the C−Cl bond provides fully functionalized
噻吩环的所有四个位置都实现了完全功能化。从容易获得的2,5-二氯噻吩开始,在用各种亲电试剂捕获3,4-双官能化的二氯噻吩后,使用TMPMgCl·LiCl连续放大3位和4位。随后的脱氯和金属化或将镁插入C-Cl键中,可提供高官能度的完全官能化的噻吩。阿托伐他汀(立普妥)的噻吩类似物的合成应用)被报告。