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PCl5-mediated ring-openings of trans-2,3-disubstituted cyclopropane-1,1-diesters: A stereoselective way to trisubstituted vinyl chlorides
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文摘
An unprecedented ring-opening mode of trans-2-aroyl-3-aryl-cyclopropane-1,1-dicarboxylates involving the cleavage of the C2C3 bond of the cyclopropane ring mediated by PCl5 was disclosed. This reaction provides an efficient metal-free way to functionalized stereodefined trisubstituted Z-vinyl chlorides in moderate to good yields. A tentative mechanism for the reaction has been proposed.

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