Stereoselective synthesis of vinylbenzothiazoles and their epoxides.
摘要:
Vinylbenzothiazoles 2 were stereoselectively prepared through isomerization of allylbenzothiazoles 1. Oxiranes 5 and 8 were synthesized from 2 and 1 via cyclization of the corresponding bromohydrins 3, 4, 6 and 7.
The title benzothiasoles 1 react with allylicGrignard reagents affording 2-allylbenzothiazoles 5, 2,2-diallyl- benzothiazolines 6 and N-triallylmethyl-o-aminobenzenethiols as disulphides 7 depending upon the experimental conditions. The reaction is considerably influenced by the solvent used and the nature of the allylicGrignard. A possible mechanism for the formation of compounds 5, 6 and 7 is reported
Stereoselective synthesis of vinylbenzothiazoles and their epoxides.
作者:S. Florio、G. Ingrosso、L. Ronzini、E. Epifani
DOI:10.1016/s0040-4020(01)86401-2
日期:1991.1
Vinylbenzothiazoles 2 were stereoselectively prepared through isomerization of allylbenzothiazoles 1. Oxiranes 5 and 8 were synthesized from 2 and 1 via cyclization of the corresponding bromohydrins 3, 4, 6 and 7.