Tetrahedron Letters p. 2461 - 2464 (1991)
Update date:2022-08-11
Topics:
Zelle
McClellan
The methylenation of a variety of catechols is described, employing cesium carbonate and bromochloromethane in dimethylformamide at 110°C or acetonitrile at reflux. The corresponding methylenedioxy derivatives are obtained in 86-97 yield. Utilization of this method provided β-hydrastine in 70% yield from its corresponding dihydroxy analog.
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