Diisopropylethylamine → N-diaminomethylene-3-methylsulfonyl-4-(3-pyridyloxy)-6-methylbenzamide

Participants

Reaction Steps

1.0 g of 3-methylsulfonyl-4-(3-pyridyloxy)-6-methylbenzoic acid [obtainable by reacting 3-methylsulfonyl-4-chloro-6-methylbenzoic acid with 3-hydroxypyridine] is dissolved in 15 ml of 1-methylpyrrolidone, and 0.67 g of 1-methyl-2-chloropyridinium chloride is added to this solution, which is stirred for 15 min. 0.9 g of guanidinium chloride and 2.6 ml of N-ethyldiisopropylamine are then added, and the mixture is stirred at room temperature for one hour. Following customary working-up, N-diaminomethylene-3-methylsulfonyl-4-(3-pyridyloxy)-6-methylbenzamide is obtained, m.p. 221-224°.

Provenance & Evidence