Abstract

Abstract Enamines react with an alcoholic solution of [FeH(CO)4]− (1), [Fe2H(CO)8]− (2), and [Fe3H(CO)11]− (3), with the absorption of carbon monoxide at room temperature, to give the corresponding saturated tertiary amines. The reduction of the pyrrolidine enamine of 2-methylcyclohexanone with 1, 2, and 3 gave cis and trans N-(2-methyl-1-cyclohexyl)pyrrolidine. The cis/trans ratio of the products were characteristic of 1, 2, and 3; the values, 0.67, 1.2, and 2.1 respectively, represent the bulkiness of the hydrides. The mechanism of the reduction was discussed.

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