A facile and practical method for the synthesis of ArC≡CCF3 is described which involves (1) conversion of aldehydes ArCHO into ArCH=CClCF3 with 1,1,1-trichloro-2,2,2-trifluoroethane, zinc powder, and acetic anhydride in one-pot and (2) dehydrochlorination with sodium t-butoxide or sodium amide/t-butyl alcohol.
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Hiyama et al. (1989) studied this question.
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