P. Pigeon et al., SELECTIVE ACCESS TO N-ARYL OR N-ALKYL DERIVATIVES OF ISOINDOLO[2,1-B][2,4]BENZO(OR THIENO)DIAZEPINES, Tetrahedron, 54(8), 1998, pp. 1497-1506
N-alkyl isoindolo[2, 1-b][2,4]benzodiazepines 15c were synthesized via
an intramolecular N-acyliminium ion-amide reaction, N-aryl derivative
s 8c were obtained from an intramolecular acylation of amino acids 6c
in acetic anhydride. A generalization of these methodologies is given
in the synthesis of the thiophenic analogues 15d and 8d. (C) 1998 Else
vier Science Ltd. All rights reserved.