On the Structure of the Diels-Alder Adducts Obtained from (E)-3-Methoxycarbonylmethylene-2-oxoindoline with Unsymmetrical Butadiene Derivatives

Abstract

The Diels-Alder reaction of (E)-3-methoxycarbonylmethylene-2-oxoindoline with trans- and cis-1,3-pentadienes gave a single product, respectively, in high yield. The structural features of these adducts were elucidated by proton nmr analysis and chemical transformations