反应详情

Into a 3-necked 100 ml flask was introduced methyl N-(2,2,6,6-tetramethyl-4-piperidinyl)oxamate (4.85 g, 0.02 mole) and 50 ml of methanol. The flask was equipped with a magnetic stirrer, a thermometer and a reflux condenser. The mixture was stirred until all of the solid material dissolved, following which 3-(3,5-di-t-butyl-4-hydroxyphenyl)propionhydrazide (5.85 g, 0.02 mole) was added and the mixture was refluxed for 2 hours. The solid material was filtered off and air dried. The product weighed 2.7 g and had a melting range of 255°-257° C. The infrared scan of the product contained strong carbonyl bands at 1655, 1620, 1590 and 1490 cm-1.

1. customThe flask was equipped with a magnetic stirrer
2. dissolutiondissolved
3. additionwas added
4. temperaturethe mixture was refluxed for 2 hours
5. filtrationThe solid material was filtered off
6. customair dried