反应详情

3 mols of methyl methacrylate, 50 parts per million (ppm) of phenothiazine, 50 ppm of 4-methyl-2,6-di-tert.butylphenol (as a stabilizer/inhibitor), and 0.05 mol of the catalyst employed are heated to boiling in a 0.5 liter four-necked flask while a weak stream of air is introduced and the reaction mixture is stirred. Now, 0.5 mol of benzylamine was added dropwise over a period of one hour and the methanol/methylmethacrylate azeotrope which is formed was distilled off with a high reflux (bath temperature about 160° C.). Thereafter, the mixture was boiled for a further five hours while methanol/methylmethacrylate is circulated out of the system. The product yields of N-benzyl-methacrylamide, referred to the amine reagent, are reported in Table 1.

1. customto boiling in a 0.5 liter four-necked flask while a weak stream of air
2. additionis introduced