Sequential processing of monolithiated tertiary propargylamines with 2-(vinyloxy)ethyl
isothiocyanate and t-BuOK–DMSO results in the introduction of a highly reactive 2-(vinyloxy)ethyl group
at the position 1 of the pyrrole ring thus formed. In this way, a series of new 5-sulfanyl-1-[2-(vinyloxy)ethyl]-1H-pyrrol-2-amines were obtained in a yield of up to 92%. The latter in the presence
of t-BuOK–DMSO system (110–120 °C, 10–15 min) eliminates vinyl alcohol to give rare-functionalized
1-vinylpyrroles, namely 5-sulfanyl-1-vinyl-1H-pyrrol-2-amines, inaccessible by the known methods.
Key words
5-sulfanyl-1-[2-(vinyloxy)ethyl]-1
H-pyrrol-2-amines - 5-sulfanyl-1-vinyl-1
H-pyrrol-2-amines - propargylamines - 2-(vinyloxy)ethyl isothiocyanate - alkylating
agents - deprotonation - isomerization - C–O bond cleavage