Preparation of N-substituted imidazolidinones and N-substituted

Details Preparation of N-substituted imidazolidinones and N-substituted Preparation of N-substituted imidazolidinones and N-substituted

1983-01-20

1987-02-10

Schwartz, Richard A.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548320, 548321, 548322, C07D23336

Patent

active

046423516

ABSTRACT:
The invention is a process for the preparation of N-substituted imidazolidinones and N-substituted 2-thionimidazolidinones which comprises contacting an oxazolidinone with a compound containing a nitrogen directly bonded to a carbonyl or a thiocarbonyl group in the presence of a Lewis acid catalyst or the hydrate of a Lewis acid catalyst under conditions such that an N-substituted imidazolidinone or N-substituted 2-thionimidazolidinone is prepared. The compound containing a nitrogen directly bonded to a carbonyl or a thiocarbonyl group is an isocyanate or isothiocyanate or a compound wherein the nitrogen is reactive and the carbonyl or thiocarbonyl group is further bonded to a substituent by a bond which is clevable under the reaction conditions. The Lewis acid catalyst corresponds to the formula

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