Yn. Bubnov et al., ALLYLBORATION AND CYCLIZATION OF 3,4-DIHYDROISOQUINOLINE DERIVATIVES - SYNTHESIS OF THE BENZOPYRROCOLINE SYSTEM, Russian chemical bulletin, 45(4), 1996, pp. 890-892
A novel approach to hexahydropyrrolo[2,1-a]isoquinolines (hexahydroben
zo[g]pyrrocolines) based on the allylboration of 3,4-dihydroisoquinoli
nes followed by closure of the pyrrolidine ring through the hydroborat
ion - oxidation - intramolecular N-alkylation sequence was developed.