Unexpected Reactivity of Imidazo[2,1-b]thiazolines with Organometallic Reagents
摘要:
The reaction of imidazo[2,1-b]thiazolines with various organometallic reagents is described, Nucleophilic attack of organolithium reagents on sulfur occurs with extrusion of ethylene to produce 5-thioalkyl- or 2-thioarylimidazoles. The outcome with Grignard reagents, however, is less predictable, with some reagents adding at sulfur and others reacting at C-2 or not at all.