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2005
Organo-boron compounds
S 0040
Microwave-Assisted Preparation of Aryltetrazoleboronate Esters. — A convemethod for the preparation and isolation of the title compounds is demonstrated.
02- 168 nient
The protection of the boronic acid functionality as the pinacol ester greatly increases
preparative efficiency, and the use of microwave irradiation provides rapid access to
the products. A second reaction cycle is crucial for the complete conversion of the substrates; in the case of (X) even a third reaction cycle is needed. The unprotected tetrazole containing boronic acids can be applied in the microwave-assisted Suzuki coupling reaction with aryl halides. — (SCHULZ*, M. J.; COATS, S. J.; HLASTA, D. J.;
Org. Lett. 6 (2004) 19, 3265-3268; Drug Discovery, Johnson & Johnson Pharm. Res.
Dev., Spring House, PA 19477, USA; Eng.) — Steudel
2005
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