Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1979-12-10
1981-10-13
Jiles, Henry R.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
548302, 548317, 548319, C07D23370
Patent
active
042949734
ABSTRACT:
A process for the preparation of a diacylated 4-imidazolin-2-one of the formula ##STR1## wherein R.sup.1 and R.sup.2 independently represent hydrogen, optionally substituted alkyl, cycloalkyl, aryl and alkoxy, which comprises contacting a compound of the formula ##STR2## wherein R.sup.1 and R.sup.2 have the previously assigned significance with a source of chlorine at a temperature from 20.degree. to 150.degree. C. in the presence of a radical forming agent or under ultra-violet light and thereafter dehydrohalogenating or dehalogenating the resultant chlorinated product.
The diacylated 4-imidazolin-2-ones prepared by the process are useful for photochemical cycloadditions and as intermediates for the preparation of compounds in the biotin series.
REFERENCES:
patent: 2441935 (1948-05-01), Duschinski
patent: 2694726 (1954-11-01), Anspon
Roberts et al., Basic Principles of Organic Chemistry, pp. 91-92, 203, 306-308, 320-321, 935, Benjamin, N.Y., 1965.
Hofmann, Imidazole and Its Derivatives, Pt. I, p. 70, Interscience, New York, 1953.
Hartmann Willy
Heine Hans-Georg
Scholz Karl-Heinz
Bayer Aktiengesellschaft
Harkaway N.
Jiles Henry R.
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