Process for the preparation of diacylated 4-imidazolin-2-ones

Details Process for the preparation of diacylated 4-imidazolin-2-ones Process for the preparation of diacylated 4-imidazolin-2-ones

1978-03-08

1980-12-09

Rotman, Alan L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548302, 548317, 548319, C07D23370

Patent

active

042386187

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 of II ##STR2## wherein R.sup.1 and R.sup.2 of 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, 308, 320-321, 935, Benjamin, N.Y. 1965.

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