Dihydrooxadiazinones and method for making

Details Dihydrooxadiazinones and method for making Dihydrooxadiazinones and method for making

1977-04-21

1979-07-03

Randolph, John D.

Organic compounds -- part of the class 532-570 series

Organic compounds

Chalcogen in the nitrogen containing substituent

C07D27304

Patent

active

041600886

ABSTRACT:
Dihydrooxadiazinones are provided which can be used as blowing agents in various thermoplastic polymeric materials to produce high performance thermoplastic foams. A ketone having at least one .alpha.-hydrogen atom is halogenated and hydroxylated to produce an .alpha.-hydroxyketone. Condensation of the .alpha.-hydroxyketone with an organocarbazate produces the corresponding carboorganooxyhydrazone which is cyclized to a dihydrooxadiazinone.

REFERENCES:
patent: 4097425 (1978-06-01), Niznik
patent: 4097671 (1978-06-01), Niznik
Edwards et al., J. Chem. Soc., 1937, pp. 1942-1946.
Rosenblum et al., J. Am. Chem. Soc., vol. 85, pp. 3874-3878 (1963).
Blatt, Organic Syntheses, Collective vol. 2, pp. 480-481, John Wiley & Sons, Inc., NY (1943).
Weidenhagen et al., Ber. Deut. Chem., vol. 68, pp. 1953 & 1955 (1935).
Beilsteins Handbuch der Organishchen Chemie, 4th Ed., 3rd Supplement, 7th vol., 2nd part, pp. 967 & 979, Springer-Verlag, Berlin, Germany (1968).

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