Synthesis of Unexpected Bifunctionalized Thiazoles by Nucleophilic Attack on Allenyl Isothiocyanate
作者:Baker Jawabrah Al-Hourani、Frank Richter、Kai Vrobel、Klaus Banert、Marcus Korb、Tobias Rüffer、Bernhard Walfort、Heinrich Lang
DOI:10.1002/ejoc.201301851
日期:2014.5
reactivity is also seen with N-aminophthalimide. In the presence of azide salt, hydrazoic acid, or N,N-disubstituted hydroxylamines, however, allenyl isothiocyanate is converted into bifunctionalized thiazoles. We explain the formation of these products by nucleophilic addition at the isothiocyanato moiety followed by ring closure and an N–N or N–O cleavage reaction to generate short-lived 2-imino-5-methylidenethiazole