A novel imidazolium-based ionic liquid-supported hypervalent iodine reagent has been synthesized and employed for a âcatch and releaseâ strategy with substituted acetophenones to generate various α-substituted acetophenones in good to excellent yields. The use of an ionic liquid-supported hypervalent iodine reagent avoids chromatographic separation for the purification of α-substituted acetophenones and thus makes the method greener.
A mild, efficient and metal-free method was described for the green synthesis of dipyrromethanes from aldehydes and unsubstituted pyrrole catalyzed by SO3H-functionalized ionicliquids (SO3H-ILs) in aqueousmedia at room temperature. Notably, SO3H-ILs, 1-butylsulfonic-3-methylimidazolium hydrogen sulfate ([bsmim][HSO4]) was the most efficient catalyst for moderate to good yields of the corresponding
practical ionicliquid phase synthesis (IoLiPS) of aza-heterocycles has been developed through a ‘catch-and-release’ strategy using an ionic liquid-supported hypervalent iodine reagent. The hypervalent iodine played a dual role as a reagent and as a soluble support. This strategy provided a combinatorial approach for the synthesis of 2-aminothiazoles and imidazo[1,2-a]pyridines directly from substituted
通过使用离子液体负载的高价碘试剂的“捕获并释放”策略,已经开发了氮杂杂环的有效且实用的离子液相合成(IoLiPS)。高价碘起着试剂和可溶性载体的双重作用。该策略提供了从取代的苯乙酮直接合成2-氨基噻唑和咪唑并[1,2- a ]吡啶的组合方法,收率很高。通过使用有机溶剂简单萃取,使用离子液体支持的试剂可以更好地分离产物。