Reaction of methyl isothiocyanate with two equivalents of lithium diisopropylamide, followed by alkylation with dimethyl sulfate gives 2-methyl-5-N,N-dimethylaminothiazole in a high yield. The isomer, 1-methyl-2,5-bis(methylthio)imidazole is obtained in a high yield, if prior to methylation, the reaction mixture is stirred for some period with water at room temperature. © 1997 Elsevier Science Ltd
异硫氰酸甲酯与两个当量的
二异丙基氨基
锂反应,然后与
硫酸二甲酯烷基化,从而以高收率得到2-甲基-5- N,N-二甲基
氨基
噻唑。以高收率获得异构体1-甲基-2,5-双(甲
硫基)
咪唑,如果在甲基化之前,将反应混合物在室温下用
水搅拌一段时间。©1997爱思唯尔科学有限公司。