Effect of substituents on the stereochemical course of Diels–Alder reaction between β-nitrostyrenes and trans,trans-1,4-diphenylbutadiene
Abstract
In a study of the Diels–Alder reaction of trans,-trans-1,4-diphenylbutadiene with β-nitrostyrenes a marked stereoselectivity to phenyl “endo” adducts has been observed on introduction of electron-withdrawing substituents in the para-position of the phenyl ring of the β-nitrostyrenes.