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A cascade approach to 1-(trifluoromethyl)-4-fluoro-1,2-dihydroisoquinolines and 4,4-difluorotetrahydroisoquinolines has been developed. The procedure involves a silver-catalyzed intramolecular aminofluorination of alkyne. This one-pot reaction provides an efficient way to synthesize various fluorinated isoquinolines.
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Liu et al. (2013) studied this question.
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