(Propargylsulfanyl)-2-aza-1,3,5-trienes as a direct source for novel family of highly functionalized 4,5-dihydro-1,3-thiazoles
作者:Nina A. Nedolya、Ol'ga A. Tarasova、Alexander I. Albanov、Lyudmila V. Klyba、Boris A. Trofimov
DOI:10.1016/j.tet.2016.12.064
日期:2017.2
2-(1-alkoxyprop-1-enyl)-5-ethenylidene-4,5-dihydro-1,3-thiazoles has been disclosed through the reaction of (propargylsulfanyl)-2-aza-1,3,5-trienes (readily available from alkoxyallenes, isothiocyanates, and propargyl bromide) with potassium or sodium tert-butoxide (1.1–1.4 equiv) under mild conditions [DMSO/THF (∼1:4–5), ca. −30 °C, 15–30 min]. The process proceeds through deprotonation of an activated SCH2 group