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Synthesis 1986; 1986(5): 383-385
DOI: 10.1055/s-1986-31643
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Reductions via Boranes: A New, Convenient Method for the Preparation of 3-Substituted Esters and Thioesters of 3,4-Dihydrocoumarin

B. S. Kirkiacharian* , A. Danan
  • *Laboratoire de Pharmacie Chimique-Chimie Thérapeutique, Faculté de Pharmacie do Paris-Sud, rue J. B. Clément. F-92290 Chatenay-Malabry, France
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Publication Date:
27 September 2002 (online)

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Reductions of various O-ethyl coumarin-3-carboxylates and O-ethyl coumarin-3-thioncarboxylates with diborane, borane dimethyl sulfide. 9-borabicyclo[3.3.1]nonane, and bis[t-butylthio]ethane-diborane lead to the corresponding 3,4-dihydro derivatives with good yields.