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- W2016570326 abstract "Although simple aliphatic esters and lactones have long been thought to lie outside the reducing range of SmI2, activation of the lanthanide reagent by H2O allows some of these substrates to be manipulated in an unprecedented fashion. For example, the SmI2−H2O reducing system shows complete selectivity for the reduction of 6-membered lactones over other classes of lactones and esters. The kinetics of reduction has been studied using stopped-flow spectrophotometry. Experimental and computational studies suggest that the origin of the selectivity lies in the initial electron-transfer to the lactone carbonyl. The radical intermediates formed during lactone reduction with SmI2−H2O can be exploited in cyclizations to give cyclic ketone (or ketal) products with high diastereoselectivity. The cyclizations constitute the first examples of ester-alkene radical cyclizations in which the ester carbonyl acts as an acyl radical equivalent." @default.
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- W2016570326 date "2009-09-18" @default.
- W2016570326 modified "2023-09-30" @default.
- W2016570326 title "Studies on the Mechanism, Selectivity, and Synthetic Utility of Lactone Reduction Using SmI<sub>2</sub> and H<sub>2</sub>O" @default.
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- W2016570326 doi "https://doi.org/10.1021/ja906396u" @default.
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