STEREOSELECTIVE SYNTHESIS OF BICYCLIC PYRROLIDINES AND PIPERIDINES VIA THE REDUCTIVE ALKYLATION OF AZIDES WITH ORGANYLDICHLOROBORANES - INTRAMOLECULAR NUCLEOPHILIC-SUBSTITUTION TANDEM SEQUENCE
Jm. Jego et al., STEREOSELECTIVE SYNTHESIS OF BICYCLIC PYRROLIDINES AND PIPERIDINES VIA THE REDUCTIVE ALKYLATION OF AZIDES WITH ORGANYLDICHLOROBORANES - INTRAMOLECULAR NUCLEOPHILIC-SUBSTITUTION TANDEM SEQUENCE, Synlett, (8), 1993, pp. 595-597
Omega-halogenoalkyldichloroboranes are easily prepared in a stereocont
rolled manner by hydroboration of omega-bromoalkylcycloalkenes or Diel
s-Alder reaction of (E)-alkenyldichloroboranes. Amination with benzyla
zide followed by an intramolecular nucleophilic substitution afforded
the corresponding trans-pyrrolidines or piperidines.