反应详情

10.6 g of N-(2-thiazolyl)-acetamide, 325 ml of tetrahydrofuran and 106 ml of n-butyllithium in hexane titrating 1.4M and 11.4 g of 2-(1-chloro-2-methylpropyl)-8-(trifluoromethyl)-4H-3,1-benzoxazin-4-one of Step A in solution in 80 ml of tetrahydrofuran were reacted by the procedure of Step A of Example 6 of Belgian Pat. No. 896,941 to obtain 13.8 g of 2-[(2-chloro-1-oxo-3-methylbutyl)-amino]-β-oxo-N-(2-thiazolyl)-3-(trifluoromethyl)-benzene propanamide melting at 186° C.