Ethyl 2-chloroacetoacetate → 5-Thiazolecarboxylic acid, 2-(3-cyano-4-(2-methylpropoxy)phenyl)-4-methyl-, ethyl ester

Participants

Reaction Conditions

Reaction Steps

Toluene (50 mL) was placed into a round bottom flask and 3-cyano-4-isobutoxybenzothioamide (5.0 g) was added, followed by addition of ethyl-2-chloroacetoacetate (4.25 g). The mixture was heated to reflux and maintained until reaction completion. After the reaction was completed, the mass was cooled to about 25° C. and maintained at that temperature for about 20 minutes. The reaction mass was then filtered and the solid was washed with toluene (10 mL). The wet solid was dried at about 75° C. to a constant weight to yield 4.0 g of the title compound. Purity by HPLC: 99.41%.

Provenance & Evidence