Iodine catalyzed one-pot five-component reactions for direct synthesis of densely functionalized piperidines
作者:Abu T. Khan、Md. Musawwer Khan、Kranthi K.R. Bannuru
DOI:10.1016/j.tet.2010.07.075
日期:2010.9
convenient one-pot multicomponent reaction (MCR) has been developed for the synthesis of highlyfunctionalized piperidines catalyzed by molecular iodine. This strategy demonstrated five-componentreactions of 1,3-dicarbonyl compounds, amines and aromatic aldehydes in methanol using 10 mol % of iodine at room temperature. This methodology provides an alternative approach for easy access of highly and fully
BromodimethylsulfoniumbromidecatalyzesMannich-typereactions of a variety of aldimines, generated in situ from aldehydes and anilines, with enolizable ketones or diethyl malonate in three-componentreactions to afford the corresponding β-amino carbonyl compounds. The salient features of this protocol are: shorter reaction times, simplicity of the procedure, good to excellent yields, avoidance of