Ethanolamine → N-(2-Hydroxyethyl)methacrylamide

A round-bottom flask with a magnetic stirrer is charged with 61.1 g of ethanolamine, 5.4 g of sodium methoxide and 0.4 g of phenothiazine. The contents are stirred. A mixture of 100.1 g of methyl methacrylate and 0.6 g of Irganox 1010* are added with stirring from a dropping funnel over a period of 90 minutes. The temperature is maintained below 40° C. during the addition. The mixture is left to stand at room temperature for about 23 hours. One gram of Irganox 1010* is added and the mixture is stripped on a rotary evaporator at about 60° C. and 8 mm Hg pressure. Product (125 g) is recovered and analyzed by gas chromatography to be 90 percent HEMA. Proton nuclear magnetic resonance spectra show that about 17 mole percent of the product has addition across the double bond and 83 percent is HEMA.

1. additionare added
2. stirringwith stirring from a dropping funnel over a period of 90 minutes
3. temperatureThe temperature is maintained below 40° C. during the addition
4. waitThe mixture is left
5. customthe mixture is stripped on a rotary evaporator at about 60° C.
6. customProduct (125 g) is recovered
7. additionaddition across the double bond and 83 percent

ORD-Eintrag

ord-7828e30080f94ea8a326141f22e36bc9

Quelldatensatz

uspto-grants-1991_07

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US05034536