Prototropic control of the di-π-methane photorearrangement
Abstract
The state of protonation and hydrogen bonding in a monoester (1) of dibenzobarrelene-11,12-dicarboxylic acid (9,10-etheno-9,10-dihydroanthracene-11,12-dicarboxylic acid) controls the regioselectivity of its di-π-methane photorearrangement.