Abstract The photochemical reaction between 1, 4-naphthoquinone (3) and several aliphatic and aromatic aldehydes 5a− f resulted in the formation of acylated naphthohydroquinones 6a− f in moderate to good yields of 42− 79%. When benzaldehyde was used, the dibenzoylated product 7 was also isolated, in 14% yield. The regioselectivity was studied with the unsymmetrical substituted naphthoquinone 4 and butyraldehyde 5b and ...
