Abstract
A convenient synthetic method has been developed for accessing 2,6-dialkynyl-3,5-dichloropyridine derivatives in acceptable to good yields. The methodology involved ultrasound assisted site-selective alkynylation of 2,3,5,6-tetrachloropyridines under Pd/CCu catalysis. A variety of terminal alkynes were employed in this CC coupling reaction to afford the corresponding 2,6-dialkynyl-3,5-dichloropyridine derivatives.
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