A highly efficient method for kineticresolution of racemic aliphatic alcohols without conversion of the hydroxyl group has been realized; the method involves hydrogenation mediated by a remote ester group and is catalyzed by a chiral iridium complex. This powerful, environmentally friendly method provides chiral δ-alkyl-δ-hydroxy esters and δ-alkyl-1,5-diols in good yields with high enantioselectivities
A quinoxalinone derivative of the formula (I):
or a pharmaceutically acceptable salt or ester thereof, wherein;
X is NH, S or the like;
Y is O or the like;
the partial structure
is, for example, the formula:
B
1
, B
2
, . . . , B
n−1
and B
n
, (in which n is 4, 5 or 6) are each independently CH, N or the like;
B′
1
, B′
2
, . . . , B′
n−1
and B′
n
(in which n is 4, 5 or 6) are each independently hydrogen or the like; and
R is hydrogen, lower alkyl or the like.