Y. Ikeura et al., ENANTIOSELECTIVE SYNTHESIS OF AN AXIALLY CHIRAL 1,7-NAPHTHYRIDINE-6-CARBOXAMIDE DERIVATIVE HAVING POTENT ANTAGONIST ACTIVITY AT THE NK1 RECEPTOR, Chemical communications, (19), 1998, pp. 2141-2142
A new and highly potent NK1 antagonist, (aR,9R)-3 oromethyl)benzyl]-8,
9,10,11-tetrahydro-9-methyl-5- (4-methylphenyl)-7H-[ 1,4]diazocino[2,1
g][1,7]naphthyridine-6,13-dione], was atropdiastereoselectively synthe
sized in good yield by cyclization of the chiral intermediate 6b.