BigPatents India

A process for preparing 5H-dibenz[b, f]azepine-5-carboxamide of the general formula I, wherein R1, R2, R3, and R4 are the same or different 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-C10 alkyl, C3-C10 cycloalkyl, C2-C10 alkenyl C5-C10 cycloalkenyl, C2-C10 alkynyl, and C6-C20 aryl, wherein the two A groups of –N(R)2 and –CON(R)2 can be the same or different, and wherein R2 and R3 can together form a bond is provided; the process comprising reacting 5H-dibenz[b,f]azepine of the general formula II, wherein R1, R2, R3 and R4 have the aforementioned meanings, with one or more alkali or alkaline-earth cyanate and in the presence of one or more unsaturated dicarboxylic acids. (I) (II) Drawing: NIL Total Pages: 23 Fig. Nil