Rhodium Carbenoid Induced [1,2]-Migration in an l-Lyxo-Configured α-Diazo β-Keto Ester: Synthesis of a New Griseolic Acid Analogue
作者:Dilip Dhavale、Namdeo Bhujbal、K. Kumar
DOI:10.1055/s-0029-1216835
日期:2009.7
substituted α-diazo β-keto ester, prepared fromd-glucose, on treatment with a catalytic amount of dirhodium tetraacetate gave a strained 1,5-dioxabicyclo[3.3.0]octane ring system with concomitant diastereoselective formation of a quaternary carbon substituted with both an ethoxycarbonyl group and a 2-ethoxy-2-oxoethyl group; the product is a key intermediate in the synthesis of a new griseolic acid analogue