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.
Benign and efficient preparation of thioethers by solvent-free <i>S</i>-alkylation of thiols with alkyl halides catalyzed by potassium fluoride on alumina
作者:Kha Ngoc Nguyen、Fritz Duus、Thi Xuan Thi Luu
DOI:10.1080/17415993.2016.1150483
日期:2016.5.3
various thiols with alkyl halides under solvent-free reactionconditions using potassium fluoride on alumina (KF/Al2O3) as a solid catalyst has been investigated in detail with respect to three different modes of reaction activation (ultrasound irradiation, microwaveirradiation, and conventional heating) for obtaining maximum yield of the thioether. The importance of KF/Al2O3 as a particularly efficient