All articles of this category Methyl 1-alkoxy-3-perfluoroalkyl-2-naphthoates 5 were synthesized by heating appropriately substituted 2-triphenylphosphoranylidene-2-butenoates 3 in xylenes at 250°C in a sealed tube. Compounds 3 were obtained via an intramolecular Wittig reaction of 2-alkoxycarbonylbenzyltriphenylphosphonium bromide ( 1 ) with methyl 2-perfluoroalkynoates 2 in the presence of potassium carbonate.
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Ding et al. (1992) studied this question.