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Catalytic asymmetric alkynylation of aldehydes with terminal alkynes was catalyzed by zinc triflate and (1 R ,2 R )‐2‐(dimethylamino)‐1,2‐diphenylethanol in toluene to give the corresponding alcohols with high enantiomeric excess up to 98% in good yields.
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Yamashita et al. (2005) studied this question.
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