Stereoselection in the Prins-pinacol synthesis of acyltetrahydrofurans |
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| Authors: | Cohen F MacMillan D W Overman L E Romero A |
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| Institution: | Department of Chemistry, 516 Rowland Hall, University of California, Irvine, California 92697-2025, USA. |
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| Abstract: | reaction: see text]. Depending upon the nature of the alkene and allylic substituents, acid-promoted rearrangements of acetals derived from anti allylic diols give 12 or stereoisomeric acyltetrahydrofurans 13. Stereoelectronic effects of the allylic substituents and the extent of bonding in the Prins cyclization transition state are central features of a proposed new model for predicting stereoselection in the Prins-pinacol synthesis of acyltetrahydrofurans. |
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