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The first example of simple Re(2)O(7)-catalyzed direct dehydrative coupling between allylic alcohols with electron-deficient amines has been achieved under mild and open flask conditions. The protocol has also been successfully applied to benzylic and propargylic alcohols. The mechanistic proof for the S(N)1-type process has also been provided.
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Das et al. (2012) studied this question.
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