Benzenesulfinic acid, sodium salt → N,N-dimethyl-N'-(3-cyano-5-formyl-4-phenylsulfonylthien-2-yl)-formamidine

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Reaction Steps

A mixture of 12.1 parts of N,N-dimethyl-N'-(4-chloro-3-cyano-5-formylthien-2-yl)-formamidine, 8.2 parts of sodium phenylsulfinate and 70 parts of methylglycol is heated at the boil for 1 hour. The precipitated product is then filtered off under suction when the mixture is cold and is washed with methylglycol and then with water and dried. 9.7 parts of N,N-dimethyl-N'-(3-cyano-5-formyl-4-phenylsulfonylthien-2-yl)-formamidine are obtained.

Provenance & Evidence