Unexpected Formation of a [2+2] Cycloaddition Product from Reaction of Methyl 7-Oxabicyclo[2.2.1]hept-2-en-2-carboxylate with a Samarium(II) Reagent

摘要

Efficient preparation of functionalized cyclic compounds is one of the main themes in organic synthesis.This is ascribed to the fact that there are many natural products and biological molecules that possess substituted ring structures.Diels-Alder reaction is a good route to construct six-membered ring structures and therefore,we have been interested in utilizing the Diels-Alder adducts to prepare functionalized cyclohexanes.