Preparation of phthalides

Details Preparation of phthalides Preparation of phthalides

1992-10-30

1994-03-22

Ivy, C. Warren

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549310, C07D30787

Patent

active

052966143

ABSTRACT:
A process for the preparation of phthalides of the formula I ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently of one another, are hydrogen, C.sub.1 - to C.sub.4 -alkyl or C.sub.1 - to C.sub.4 -alkoxy, by reacting phthalic anhydrides of the formula II ##STR2## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are as defined as above, on hydrogenation catalysts at from 50.degree. to 400.degree. C. and at from 1 to 400 bar, wherein the hydrogenation catalysts employed are essentially free from Lewis acids.

REFERENCES:
patent: 3957825 (1976-05-01), Urry et al.
patent: 4178295 (1979-12-01), Englaender et al.
patent: 4485246 (1984-11-01), Lyons
patent: 4528385 (1985-07-01), aus der Funten et al.
patent: 4973713 (1990-11-01), Manogue
patent: 5100456 (1992-03-01), Tsantrizos et al.

Affiliated with

Also associated with

Rating

Preparation of phthalides does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Preparation of phthalides, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preparation of phthalides will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-438177