A first process for producing a benzopyran carboxamide represented by the general formula [1] includes reacting 3-aminopropionitrile.1/2 sulfate, N.ident.CCH.sub.2 CH.sub.2 NH.sub.2.1/2(H.sub.2 SO.sub.4), with a benzopyran carboxylic halide represented by the general formula [2], in the presence of a base. A second process for producing the benzopyran carboxamide includes the steps of (a) reacting 3-aminopropionitrile.1/2 sulfate with a base, thereby forming 3-aminopropionitrile; and (b) reacting the 3-aminopropionitrile with the benzopyran carboxylic halide [2], thereby producing the benzopyran carboxamide. A process for stabilizing 3-aminopropionitrile includes turning the 3-aminopropionitrile into a sulfate of the 3-aminopropionitrile. ##STR1## where R is a straight-chain or non-straight-chain perfluoroalkyl group represented by C.sub.n F.sub.2n+1 where n is an integer of 1-10; and X is fluorine, chlorine, bromine or iodine.

Um primeiro processo para produzir um carboxamide do benzopyran representado pela fórmula geral [ 1 ] inclui reagir 3-aminopropionitrile.1/2 o sulfate, N.ident.CCH.sub.2 CH.sub.2 NH.sub.2.1/2(H.sub.2 SO.sub.4), com um halide carboxylic do benzopyran representado pela fórmula geral [ 2], na presença de uma base. Um segundo processo para produzir o carboxamide do benzopyran inclui as etapas (a) que reagem do sulfate 3-aminopropionitrile.1/2 com uma base, dando forma desse modo a 3-aminopropionitrile; e (b) reagindo o 3-aminopropionitrile com o halide carboxylic do benzopyran [ 2 ], produzindo desse modo o carboxamide do benzopyran. Um processo para estabilizar 3-aminopropionitrile inclui o giro do 3-aminopropionitrile em um sulfate do 3-aminopropionitrile. ## do ## STR1 onde R é um straight-chain ou grupo do perfluoroalkyl da non-reto-corrente representado por C.sub.n F.sub.2n+1 onde n é um inteiro de 1-10; e X é fluorine, cloro, bromo ou iodo.

 
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