A procedure for bis-cyclopropanation of furans with ethyl diazoacetate or methyl alpha-diazopropionate under dirhodium-tetraacetate catalysis is presented. Treatment of the products with ethanolic HCl furnished furan-3,4-diacetates.
A procedure for bis-cyclopropanation of furans with ethyl diazoacetate or methyl alpha-diazopropionate under dirhodium-tetraacetate catalysis is presented. Treatment of the products with ethanolic HCl furnished furan-3,4-diacetates.
A procedure for bis-cyclopropanation of furans with ethyl diazoacetate or methyl alpha-diazopropionate under dirhodium-tetraacetate catalysis is presented. Treatment of the products with ethanolic HCl furnished furan-3,4-diacetates.