Copper- and palladium-catalyzed intramolecular C–S bond formation: a convenient synthesis of 2-aminobenzothiazoles
- 28 January 2004
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Chemical Communications
- No. 4,p. 446-447
- https://doi.org/10.1039/b311591g
Abstract
Copper- and palladium-catalyzed intramolecular C–S bond formation by cross-coupling between an aryl halide and thiourea functionality is demonstrated for the synthesis of 2-aminobenzothiazoles, wherein the Cu-catalyzed protocol is generally superior and more cost effective than the Pd-catalyzed protocol; the Cu-catalyzed reaction also further expands recent studies exploring the utility of Cu salts as replacements for Pd in carbon–heteroatom bond-forming reactions. A one-pot variant combining the synthesis of the thiourea and the cyclization was also demonstrated.Keywords
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