Catalysts

Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Reexamination Certificate

active

07074960

ABSTRACT:
A zeolite-immobilized Lewis acid e.g. copper catalyst for performing carbonyl-ene and iminoene reactions is described. The catalyst can readily be separated from the reaction mixture and re-used in further reactions with minimal reduction in activity.

REFERENCES:
patent: 5852205 (1998-12-01), Bethell et al.
Tschaen et al., Stereochemical studies of thermal intermolecular and intramolecular N-sulfonylimine ene reactions, J. Org. Chem.; 1984; 49(26); 5058-5064.
Keiji Maruoka et al., “Asymmetric Ene Reaction Catalyzed by Chiral Organoaluminum Reagent,”Tetrahedron Letters, vol. 29, No. 32, 1998, pp. 3967-3970.
Koichi Mikami et al., “Catalytic Asymmetric Glyoxylate-Ene Reaction: A Practical Access to α-Hydroxy Esters in High Enantiomeric Purities,”J. Am. Chem. Soc., vol. 12, No. 10, 1990, pp. 3949-3954.
Koichi Mikami, “Asymmetric catalysis of carbonyl-ene reactions and related carbon-carbon bond forming reactions,”Pure&Appl. Chem., vol. 68, No. 3, 1996, pp. 639-644.
Yong Gao et al., “Stereoselective Synthesis ofmeso-2,6-Diaminopimelic Acid and Its Selectively Protected Derivatives,”J. Org. Chem., vol. 63, No. 7, 1998, pp. 2133-2143.
David A. Evans et al., “C2-Symmetric Copper(II) Complexes as Chiral Lewis Acids. Catalytic Enantioselective Carbonyl-Ene Reactions with Glyoxylate and Pyruvate Esters,”J. Am. Chem. Soc., vol. 122, No. 33, 2000, pp. 7936-7943.
William J. Drury, III et al., “A Novel Synthesis of α-Imino Esters,”J. Sam. Chem. Soc., vol. 120, No. 42, 1998, pp. 11006-11007.
David A. Evans et al., “Bis(oxazoline)-Copper Complexes as Chiral Catalysts for the Enantioselective Aziridination of Olefins,”J. Am. Chem. Soc., vol. 115, No. 12, 1993, pp. 5328-5329.
James K. Whitesell et al., Asymmetric Induction in the Ene Reaction of Glyoxylate Esters of 8 Phenylmenthol,Tetrahedron, vol. 42, No. 11, 1986, pp. 2993 to 3001.
International Search Report dated Dec. 5, 2002, from International Application No. PCT/GB02/03609.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

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

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

Rate now

     

Profile ID: LFUS-PAI-O-3596023

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.