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Synthesis of bata-Hydroxy Esters Denmark et al. have reported that the carbonylative opening of terminal epoxides proceeds under mild conditions using dicobalt octacarbonyl as a catalyst. According to their results, this reaction proceeds smoothly under 1 atm of carbon monoxide at room temperature in methanol to give the corresponding beta-hydroxy esters in high yields. Furthermore, this ring-opening reaction proceeds with retention of configuration of the original epoxide.
S. E. Denmark, M. Ahmad, J. Org. Chem., 2007, 72, 9630.