Аннотация:Although a trifluoroacetyl group belongs to the strongest mesomeric acceptors and is extremely promisingfor further transformation of the cycloadducts, only very few examples of the Diels-Alder reactionsof trifluoroacetylacetylenes have been reported up to date. Herein, we describe the simple preparation of1-trifluoroacetyl-2-halogenoacetylenes and some sorts of their cycloaddition reactions. The unsaturatedtrifluoromethyl ketones delivering by these reactions appeared to be the useful starting materials for thepreparations of complex fluorinated fused heterocyclic compounds.