Expeditious and efficient syntheses of pure 4-methyl and 4,6-disubstituted dibenzothiophenes
作者:Catherine Kuehm-Caubère、Sandrine Adach-Becker、Yves Fort、Paul Caubère
DOI:10.1016/0040-4020(96)00459-0
日期:1996.7
4-Lithio and 4,6-dilithiodibenzothiophenes were efficiently obtained by lithiation of dibenzothiophene with BuLi and BuLi-TMEDA, respectively. Very pure 4-methyl- and 4,6-dimethyldibenzothiophenes, substrates of great request in hydrosulfurization studies were easily prepared, on large scale and in excellent yields.
通过分别用BuLi和BuLi-TMEDA对二苯并噻吩进行锂化,可以有效地获得4-Lithio和4,6-dilithiodibenzothiophenes。很容易大规模,高收率地制备非常纯的4-甲基-和4,6-二甲基二苯并噻吩,这在加氢硫化研究中有很高的要求。