反应详情

A mixture of 10 g of 2,6-dichlorobenzylglyoxal diethylacetal, 40 ml of ethanol and 20 ml of concentrated hydrochloric acid is refluxed for 4 hours and then is evaporated to dryness. The residue, which is a yellowish oil, consists of crude 2,6-dichlorobenzylglyoxal and is used in step (b) of this Example as set forth below.

1. temperatureis refluxed for 4 hours
2. customis evaporated to dryness