Process for the preparation of carboxamide compounds

Details Process for the preparation of carboxamide compounds Process for the preparation of carboxamide compounds

2005-03-11

2008-12-02

Coleman, Brenda L (Department: 1624)

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

Organic compounds

Unsubstituted hydrocarbyl chain between the ring and the -c-...

Reexamination Certificate

active

07459553

ABSTRACT:
A process for preparing 5H-dibenz[b,f]azepine-5-carboxamide of the general formula:wherein R1, R2, R3and R4are the same or different and can be hydrogen, halogen, nitro, cyano, carboxyl, R, —CO(R), —OCO(R), —O(R), —N(R)2, —CON(R)2, and —COO(R), wherein R is selected from the group consisting of C1-C10alkyl, C3-C10cycloalkyl, C2-C10alkenyl, C5-C10cycloalkenyl, C2-C10alkynyl, and C6-C20aryl, wherein the two A groups of —N(A)2and —CON(A)2can be the same or different, and wherein R2and R3can together form a bond is provided; the process comprising reacting 5H-dibenz[b,f]azepine of the general formulawherein R1, R2, R3and R4have the aforementioned meanings, with one or more alkali or alkaline-earth cyanates and in the presence of one or more unsaturated dicarboxylic acids.

REFERENCES:
patent: 3642775 (1972-02-01), Schindler
patent: 5808058 (1998-09-01), Milanese
patent: 6670472 (2003-12-01), Ansari et al.
patent: 2004/0044200 (2004-03-01), Gutman et al.

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