Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... 2-Oxiranyl and 2-aziridinyl thiazoles 3 and 7 have been prepared by lithiation of thiazoles 1a and 1b and reaction with α-halogenocarbonyl compounds [1a, 1c-d] and α-halogenoimines [1b], respectively.