Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1978-06-28
1979-02-20
Curtis, Allen B.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
544 88, C07C 2900, C07C10200
Patent
active
041407156
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.
REFERENCES:
patent: 3531525 (1970-09-01), Hoke et al.
patent: 3542867 (1970-11-01), Foecking
patent: 3542875 (1970-11-01), Raymond
patent: 3575890 (1971-04-01), Litt et al.
patent: 3649688 (1972-03-01), Gordon et al.
Bernady Karel F.
Mogolesko Paul D.
American Cyanamid Company
Costello, Jr. Charles F.
Curtis Allen B.
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