| http://www.w3.org/ns/prov#value | - A process which comprises admixing in the absence of a solvent an amine of the formula R1???NH2 and a first ester of the formula wherein R2 is an electron withdrawing group and R3 is an alkyl group; heating the mixture containing the amine and the first ester to form an intermediate compound of the formula admixing the intermediate compound with a base and a second ester of the formula said second
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