Methacrylic Acid → 1-Ethoxyethyl Methacrylate (stabilized with MEHQ)

Participants

Reaction Conditions

Reaction Steps

To 144.2 parts (2 molar equivalents) of ethyl vinyl ether was added 0.5 parts of phenothiazine, and 86.1 parts (1 molar equivalent) of methacrylic acid was added dropwise while the reaction system was cooled at 10° C. or less, and then the mixture was stirred at room temperature (25° C.) for 4 hours. After 5.0 parts of pyridinium p-toluenesulfonate was added, the mixture was stirred at room temperature for 2 hours and allowed to stand overnight at room temperature. To the reaction solution were added 5 parts of sodium bicarbonate and 5 parts of sodium sulfate, and the mixture was stirred at room temperature for 1 hour, filtered off insolubles and then concentrated under reduced pressure at 40° C. or less, and the residual yellow oil was distilled under reduced pressure to give 134.0 parts of 1-ethoxyethyl methacrylate (MAEVE) as a colorless oil corresponding to a fraction having a boiling point (bp.) of 43 to 45° C. at 7 mmHg.

Provenance & Evidence