反应详情

The same operation as in Example (106a) was performed using butyl 2-oxopentanoate (described in Akimova, L. N.; Bel'di, E. S.; J. Org. Chem. USSR (Engl. Transl.); 5; 9; 1969; 1530-1531; Zh. Org. Khim.; 5; 9; 1969; 1569-1571, 13.2 g, 76.7 mmol), bromine (3.59 mL, 70 mmol) and chloroform (80 mL), to obtain 18.5 g of the title compound as a colorless liquid (99%).