An Environmentally Benign Synthesis of <i>cis</i>-2,6-Disubstituted Tetrahydropyrans via Indium-Mediated Tandem Allylation/Prins Cyclization Reaction
作者:Minh Pham、Amir Allatabakhsh、Thomas G. Minehan
DOI:10.1021/jo7016857
日期:2008.1.1
cis-2,6-disubstituted tetrahydropyrans in good yields. Evidence suggests that InI, formed upon aldehyde (R1CHO) allylation in aqueous media, acts as a promoter for the silyl-Prins reaction with the second equivalent of added aldehyde (R2CHO). The preparation of cyclohexenyl-fused pyrans via this one-pot, three-component coupling process is presented, as is a short formal synthesis of (±)-centrolobine