28.6 ml of a solution of 1.4 moles of n-butyllithium per liter of hexane were added at 0° C. to a solution of 2.84 g of N-(2-thiazolyl)-acetamide in 100 ml of tetrahydrofuran and 3.39 g of the product of Step A were added to the mixture cooled to -70° C. The mixture was poured into ice and N hydrochloric acid and was extracted with ether. The organic phase was washed successively with N-hydrochloric acid and with water, dried and evaporated to dryness under reduced pressure. The residue was empasted with 50 ml of ether and was vacuum filtered. The product was washed and dried under reduced pressure at 50° C. to obtain 3.2 g of 2-(2-chloro-2-phenylacetamido)-β-oxo-N-(2-thiazolyl)-3-trifluoromethyl-benzenepropanamide melting at 185° C. (decomposition).
