Lactam analogues of pentalene. A new oral-pot synthesis of pyrrolo[3,2-b]pyrrole-2,5-diones deriving from pulvinic acid

Article abstract of DOI:10.1016/S0040-4039(97)01148-9

A new and convenient one-pot synthesis of a variety of N-aryl lactam analogues 4 of pentalene has been developed. Pulvinic acid dilactams 4 are of interest due to their electronic and optical features and as synthetic pigments.