Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1989-08-23
1990-11-13
Lee, Mary C.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
544315, C07D23330, C07D23902
Patent
active
049703218
ABSTRACT:
Cyclic N,N'-dimethylureas I ##STR1## where A is a 1,2- or 1,3-alkylene group of 2 to 10 carbon atoms, are prepared by reacting the corresponding non-methylated cyclic urea with formaldehyde and excess formic acid and then removing the formic acid still present in the reaction mixture, by a process in which the formic acid is subjected to a thermal decomposition reaction by means of a catalyst system consisting of a tertiary amine and a copper salt.
REFERENCES:
Journal of Chemical and Engineering Data, vol. 21, No. 2, 1976, pp. 150-153, J. Rosenfarb et al., "Dielectric Constants, Viscosities, and Related Physical Properties of Several Substituted Liquid Ureas at Various Temperatures".
Journal of Organometallic Chemistry, vol. 117, 1976, pp. 149-155, Hideki Sakurai et al., "Chemistry of Organosilicon Compounds", (with English translation).
Angew. Chem., vol. 82, 1970, pp. 73-77, (no English translation).
Betz Rainer
Fikentscher Rolf
Hahn Erwin
BASF - Aktiengesellschaft
Lee Mary C.
Whittenbaugh Robert C.
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