Conformational analysis of substituted 1,2-dihydronaphthalenes
Abstract
From coupling-constant data for a series of 2-substituted 1,2-dihydronaphthalenes it is concluded that 2-carboxy, 2-methoxycarbonyl, and 2-ethoxycarbonyl substituents preferentially occupy the pseudo-equatorial position whereas a 2-chlorocarbonyl group shows no conformational preference. The pseudo-axial preferences found here and elsewhere for substituents in the 1-position are discussed in terms of peri H interactions.