G. Curotto et al., A NEW METHOD FOR THE RESOLUTION OF AMINES AND ITS APPLICATION TO 3-AMINO-1,5-BENZODIAZEPINES, Tetrahedron : asymmetry, 6(4), 1995, pp. 849-852
A new method for the resolution of racemic amines and its application
to 3-amino-1,5-benzodiazepines is reported. The method is based upon t
he reaction of the amines with a chiral auxiliary, namely the tosyl de
rivative of (S)-(+)-methyl mandelate, followed by the separation of th
e two diastereomers formed and the subsequent hydrogenation of the sep
arated compounds to give the free chiral amines with good enantiomeric
excesses.