Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Patent
1991-10-02
1993-02-09
Shippen, Michael L.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
544276, 560124, 562401, C07C 6104
Patent
active
051854635
ABSTRACT:
Racemic Feist's acid is treated with (R)-(+)-.alpha.-methylbenzylamine to yield (1R-trans)-3-methylenecyclopropane-1,2-dicarboxylic acid, (R)-.alpha.-methylbenzylamine (1:1) salt. This salt can then be converted to (1R-trans)-3-methylene-1,2-cyclopropanedicarboxylic acid, dimethyl ester which is an intermediate in the preparation of the antiviral agent [1R-(1.alpha.,2.beta., 3.alpha.)]-2-amino-9-[2,3-bis(hydroxymethyl)cyclobutyl]-1,9-dihydro-6H-pur in-6-one. The improved process also enables the recovery of racemic Feist's acid from the resolution.
REFERENCES:
Doering et al., "Stereochemistry of the Methylenecyclopropane Rearrangement", Tetrahedron, vol. 26, pp. 2825-2835 (1970).
Ettlinger et al., "The Cis-Isomer of Feist's Acid", Chemistry and Industry, 1957, p. 891.
Bottini et al., "The Nuclear Magnetic Resonance . . . ", . J. Org. Chem., 1956, vol. 21, pp. 1169-1170.
Gajewski, "Hydrocarbon Thermal Degenerate . . . ", Jour. Amer. Chem. Soc., vol. 93, pp. 4450-4458 (1971).
Ahmad, copending commonly assigned application Ser. No. 692,752 filed Apr. 29, 1991,
Godfrey Jr. Jollie D.
Kissick Thomas P.
Mueller Richard H.
Singh Janak
Davis Stephen B.
E. R. Squibb & Sons Inc.
Shippen Michael L.
LandOfFree
Process for the preparation of an antiviral agent 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 the preparation of an antiviral agent, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of an antiviral agent will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-326519