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Trifluoromethyl‐substituted pyrazoles were synthesized via 1,3‐dipolar cycloaddition from sydnones 2a‐j and 1‐aryl‐3,3,3‐trifluoro‐propynes 5a‐f. The regioselectivity of the reaction and the spectroscopic characteristics of the products are discussed.
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Meazza et al. (1993) studied this question.
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