Abstract

Abstract Previously reported 1-cyclohexylhydroxymethyl-2,4-dimethyl-8-oxabicyclo [3.2.1]octen-3-ols 2 can be ring opened to produce substituted cycloheptenes 3 in a highly regio- and stereoselective reaction using MeLi in the presence of CeCl 3 . These functionalized cycloheptenes contain an array of five contiguous stereocenters which provide access to polypropionate fragments with 1,3,5- syn,syn methyl groups.

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