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Synthesis 1986; 1986(10): 839-840
DOI: 10.1055/s-1986-31796
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A High-Yield Method for the Methylenation of o-Dihydroxyaromatic Compounds: Synthesis of Methylenedioxycoumarins

P. Castillo* , J. C. Rodriguez-Ubis, F. Rodriguez
  • *Departamento de; Química Orgánica, Universidad Autonoma de Madrid, Cantoblanco, E-28049 Madrid, Spain
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Publication Date:
20 August 2002 (online)

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Reaction of o-dihydroxycoumarins and catechols with sodium hydride in hexamethylphosphoric triamide and dihalomethane provides the corresponding methylenedioxy compounds under mild conditions and in excellent yields.