Title: Process for preparing N-(1,1-dimethyl-3-oxobutyl)acrylamide from a 2-vinyl-1,3(4H)oxazine sulfate

Abstract: A process is disclosed for preparing N-(1,1-dimethyl-3-oxobutyl)acrylamide which comprises (1) contacting a dispersion of 5,6-dihydro-6-hydroxy-4,4,6-trimethyl-2-vinyl-1,3,3(4H)-oxazine-3-ium sulfate (1:1) in a water-immiscible organic solvent with a neutralizing or alkalizing amount of gaseous ammonia at a temperature between about 10.degree. C. and 25.degree. C. to form a solution of diacetone acrylamide in said organic solvent and a precipitate of crystalline ammonium sulfate; (2) separating the crystals of ammonium sulfate; (3) cooling the organic mother liquors recovered from step (2) to about -10.degree. C. to 20.degree. C. to crystallize N-(1,1-dimethyl-3-oxobutyl)acrylamide therefrom; and (4) recovering the crystals of N-(1,1-dimethyl-3-oxabutyl) acrylamide, washing the recovered crystals with a cold water-immiscible organic solvent and drying the same.

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Inventors: Bernady, Karel F. (Belle Mead, NJ, US)
Mogolesko, Paul D. (Belle Mead, NJ, US)

Application Number: 920099
Filing Date: 1978-06-28
Publication_date: 1979-02-20
Assignee: American Cyanamid Company (Stamford, CT)
Primary Class(es): 564/204 544/88, 564/206
Other Classes:
US Patent Ref:

3531525	Sep, 1970	Hoke et al.	260/561.
3542867	Nov, 1970	Foecking	260/561.
3542875	Nov, 1970	Raymond	260/561.
3575890	Apr, 1971	Litt et al.	544/88.
3649688	Mar, 1972	Gordon et al.	260/561.

Other Refs: 233130

Feb, 1961	AU

Primary Examiner: Curtis, Allen B.
Assistant Examiner:
Attorney: Costello, Jr.; Charles F.