反应详情

Ethyl 2-(2,4-dichlorobenzyloxyimino)-3-oxobutyrate (syn isomer, 33.7 g.), sulfuryl chloride (15.7 g.) and acetic acid (35 ml) treated in a similar manner to that of Example A-(2) to give ethyl 4-chloro-2-(2,4-dichlorobenzyloxyimino)-3-oxobutyrate (syn isomer, 40.5 g.).