Organic compounds -- part of the class 532-570 series – Organic compounds – Four or more ring nitrogens in the bicyclo ring system
Patent
1988-03-23
1990-09-11
Shah, Mukund J.
Organic compounds -- part of the class 532-570 series
Organic compounds
Four or more ring nitrogens in the bicyclo ring system
544235, 549439, 560 34, 562439, 562868, C07D23728, C07D491056
Patent
active
049564609
ABSTRACT:
A process for the preparation of 1-alkyl-3-carboxy-4-cinnolones of formula I ##STR1## wherein R and R.sub.1 are electron donor groups and R.sub.3 is an alkyl group, starting from an amine of formula II ##STR2## which is subjected to the following transformations; (1) diazotation;
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"Advanced Organic Chemistry" by Jerry March (3rd. Ed.) p. 485 (1985).
Comprehensive Heterocyclic Chemistry, vol. 3, Part 2B, pp. 42-43, "The Structure, Reactions, Synthesis and Uses of Heterocylic Compounds", Pergamon Press (1984).
Boschi Pier M.
Fusco Raffaello
Piselli Fulvio L.
Bernhardt E.
Industria Chimica Profarmaco S.p.A.
Schneider Walter H.
Shah Mukund J.
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