A Novel Stereoselective Cyclization to Functionalized Dihydropyrans
作者:Ganapathy S. Viswanathan、Jun Yang、Chao-Jun Li
DOI:10.1021/ol990789m
日期:1999.10.1
[GRAPHICS]An indium trichloride-mediated highly diastereoselective tandem carbonyl allylation-Prins cyclization-chlorination of aldehydes with allylstannanegenerated 4-halotetrahydropyrans in high yields, The reaction of 3-trimethylsilylallyltributylstannane with aldehydes led to the formation of 2,6-dialkyl-3,4-dihydropyrans with a cis diastereoselectivity.