Thiazolylmethylenetriphenylphosporane and its benzo derivative: stable and practical wittig reagents for the synthesis of vinylthiazoles and vinylbenzo
作者:Alessandro Dondoni、Giancarlo Fantin、Marco Fogagnolo、Alessandro Medici、Paola Pedrini
DOI:10.1016/s0040-4020(01)90345-x
日期:1988.1
is a stable yet quite reactive Wittig-type reagent which upon reaction with various aldehydes affords vinylthiazoles, mainly or exclusively as -isomers, in very good yields. Also the benzothiazolyl phosphorane derivative, unlike a literature report, prove to react with aldehydes. Vinylthiazoles subjected to formyl deblocking from thiazole nucleous afford two-carbon homologated satured aldehydes. As
标题的噻唑基磷烷是一种稳定但反应性很强的维蒂希型试剂,与各种醛反应后,可以很好的收率得到主要或仅作为异构体的乙烯基噻唑。而且,与文献报道不同,苯并噻唑基磷烷衍生物证明与醛反应。从噻唑核上进行甲酰基解封的乙烯基噻唑提供了两个碳均化的饱和醛。例如,这些乙烯基噻唑之一,即。β-苯基衍生物8f,证明在甲酰基解封3-苯基庚醛后加-丁基丁基锂锂得到。