R. Annunziata et al., ASYMMETRIC-SYNTHESIS OF ,8,8A,9-HEXAHYDRO-1-ALKYLPYRROLO[3,2-F]INDOLIZINES VIA INTRAMOLECULAR IMINIUM ION CYCLIZATION, Synthetic communications, 27(1), 1997, pp. 23-38
Enantiomerically pure compounds embodying the 4,6,7,8,8a,9-hexahydropy
rrolo[3,2-f]indolizine unit were synthesized via intramolecular iminiu
m ion cyclization. An improved procedure for the preparation of the ox
azolidinone 1 is also reported.