反应详情

10.25 gms of ethyl beta-methylaminocinnamate, 9.4 gms of technical grade diketene and 25 mls dry methylene chloride are mixed in a flask fitted with a calcium chloride drying tube. The reaction mixture is stored at room temperature for 117 hours. Approximately 75 ml of dry ether is added and the resulting crystalline solid is filtered to yield 8.5 gms of ethyl 1,6-dimethyl-2-phenyl-4-oxonicotinate. mp (toluene)=244-8.

1. customfitted with a calcium chloride drying tube
2. filtrationthe resulting crystalline solid is filtered