M. Othman et al., ACYLIMINIUM ION CYCLIZATIONS - SYNTHESIS OF THIENO[Z',3' 3,4]PYRROLO[2,1-ALPHA] ISOINDOLONE AND BENZO[ALPHA]THIENO[2,3(3,2 OR 3,4)-G]INDOLIZINONES/, Tetrahedron, 53(7), 1997, pp. 2495-2504
N-acyliminium cyclizations onto thiophene to give thieno[2',3':3,4]pyr
rolo[2,1-a]isoindolone (2b) and benzo[a]thieno[2,3(3,2 or 3,4)-g]indol
izinones (12a-c) were studied. (C) 1997, Elsevier Science Ltd.