反应详情

A solution of 4.99 g of dicyclohexylmethylamine (25.0 mmol) in 10 g of ethyl acetate was instilled in a suspension of 2.11 g of 1,3-cyclobutanedione (23.0 mmol) at 20° C. and stirred for 1 hour. After another 30 minutes of stirring at 5° C., the suspension was filtered and dried under vacuum. 5.53 g of the title product with a purity of 94.7 percent (according to HPLC), corresponding to a yield of 81.4 percent, relative to the cyclobutanedione, was obtained. Data for the title compound was:

1. stirringAfter another 30 minutes of stirring at 5° C.
2. filtrationthe suspension was filtered
3. customdried under vacuum