Photocycloaddition of Dimethyl Acetylenedicarboxylate to 1,3-Dimethylindole

Article abstract of DOI:10.1021/jo01291a017

In contrast to the clean photoaddition of activated indoles to dimethyl acetylenedicarboxylate (DMAD) reported in the previous paper,the reaction of 1,3-dimethylindole produces seven different products.In this paper the structures of these seven products are reported, and mechanistic considerations of the photocycloaddition of dimethyl acetylenedicarboxylate to activated indoles are discussed.