Three-component synthesis of 2-aryl-4-arylthio-tetrahydro-2H-pyrans via the Prins-cyclization
摘要:
A three-component coupling of aldehyde, homoallylic alcohol and aryl thiol, has been achieved in the presence of trifluoroacetic acid in dichloromethane at room temperature to produce 4-arylthiotetrahydropyrans in good yields with all cis-selectivity. This method is simple, selective and convenient for introducing a thiol group on a tetrahydropyran ring. (C) 2009 Elsevier Ltd. All rights reserved.
An Efficient Prins Cyclization for Stereoselective Synthesis of Tetrahydropyran from Imines and Homoallyl Alcohols
作者:Congrong Liu、Daojuan Cheng、Fulai Yang
DOI:10.1002/cjoc.201400450
日期:2014.11
An unprecedented protocol has been developed for the efficientsynthesis of substituted tetrahydropyrans via a bismuth‐promoted Prinscyclization of imines with homoallylalcohols. In the presence of 40 mol% BiCl3, a wide variety of imines react smoothly with homoallylalcohols at room temperature to give the corresponding 4‐chlorotetrahydropyran derivatives in good to excellent yields.
A three-component coupling of aldehyde, homoallylic alcohol and aryl thiol, has been achieved in the presence of trifluoroacetic acid in dichloromethane at room temperature to produce 4-arylthiotetrahydropyrans in good yields with all cis-selectivity. This method is simple, selective and convenient for introducing a thiol group on a tetrahydropyran ring. (C) 2009 Elsevier Ltd. All rights reserved.