Synthesis 2018; 50(06): 1359-1367
DOI: 10.1055/s-0036-1589149
paper
© Georg Thieme Verlag Stuttgart · New York

Efficient Direct Halogenation of Unsymmetrical N-Benzyl- and N-Phenylureas with Trihaloisocyanuric Acids

Carlos M. Sanabria
Departamento de Química Orgânica, Instituto de Química, Universidade Federal do Rio de Janeiro, CP 68545, 21945-970, Rio de Janeiro, Brazil   Email: luciasequeira@yahoo.com.br   Email: mmattos@iq.ufrj.br
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Bruno B. S. Costa
Departamento de Química Orgânica, Instituto de Química, Universidade Federal do Rio de Janeiro, CP 68545, 21945-970, Rio de Janeiro, Brazil   Email: luciasequeira@yahoo.com.br   Email: mmattos@iq.ufrj.br
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Gil M. Viana
Departamento de Química Orgânica, Instituto de Química, Universidade Federal do Rio de Janeiro, CP 68545, 21945-970, Rio de Janeiro, Brazil   Email: luciasequeira@yahoo.com.br   Email: mmattos@iq.ufrj.br
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Lúcia C. S. de Aguiar*
Departamento de Química Orgânica, Instituto de Química, Universidade Federal do Rio de Janeiro, CP 68545, 21945-970, Rio de Janeiro, Brazil   Email: luciasequeira@yahoo.com.br   Email: mmattos@iq.ufrj.br
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Marcio C. S. de Mattos*
Departamento de Química Orgânica, Instituto de Química, Universidade Federal do Rio de Janeiro, CP 68545, 21945-970, Rio de Janeiro, Brazil   Email: luciasequeira@yahoo.com.br   Email: mmattos@iq.ufrj.br
› Author Affiliations
Further Information

Publication History

Received: 02 October 2017

Accepted after revision: 14 November 2017

Publication Date:
13 December 2017 (online)


Abstract

A simple and efficient methodology for the direct halogenation of N-phenylureas was developed using trihaloisocyanuric acids in acetonitrile at room temperature. This protocol proved to be effective for the construction of N-phenylureas with different patterns of substitution. Additionally, less reactive N-benzylureas were halogenated in the presence of a mixture of trifluoroacetic acid and acetonitrile at room temperature.

Supporting Information