M. Othman et al., Polycyclic systems: Synthesis of isoindolo[2,1-b]pyrrolo[1,2-d] [2,4]benzodiazocine and isoindolo[1,2-d]pyrrolo[1,2-a][1,5]benzodiazocine, J HETERO CH, 36(3), 1999, pp. 735-738
The synthesis of isoindolo[2,1-b]pyrrolo[1,2-d][2,4]benzodiazocine 7 and is
oindolo[1,2-d]pyrrolo[1,2-a]-[1,5]benzodiazocine 13 are described starting
from 2-(2-methoxycarbonyl)benzylphthalimide 1a and ethyl beta-bromohomophth
alate 9 respectively.