C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/279.4
C07D 401/04 (2006.01) C07D 405/04 (2006.01)
Patent
CA 2009924
Abstract The invention relates to a process for resolving the enantiomers of trans-3-hydroxy-3,4-dihydro 2,2- dimethyl-4-(2-oxo-1,2-dihydropyridin-1-yl)-2H-1-benzo- pyran-6-carbonitrile (I), characterized in that racemic I, together with a small amount of (-)-I [or (+)-I], is dissolved in an inert solvent or solvent mixture, the solution is seeded with (-)-I [or (+)-I], the (-)-I [or (+)-I] which has precipitated is isolated, further racemic I is dissolved in the filtrate, the mixture is seeded with (+)-I [or (-)-I], the (+)-I [or (-)-I] which has precipitated is isolated, and if desired this crys- tallization cycle is repeated once or several times.
Fetherstonhaugh & Co.
Merck Patent Gesellschaft Mit Beschraenkter Haftung
LandOfFree
Process for resolving the enantiomers of a benzopyran... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for resolving the enantiomers of a benzopyran..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for resolving the enantiomers of a benzopyran... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1880999