Abstract
AbstractAn efficient method to access 2‐triazolyl thio‐/selenopyridines with good to excellent yields by ruthenium(II)‐catalyzed one‐pot [3+2]/[2+2+2] cycloaddition reactions of azides, 1‐alkynyl thio‐/selenocyanates and 1,6‐diynes is reported. This atom‐economical catalytic strategy offers a mild and practical approach to access a variety of such cycloadducts with good to excellect regioselectivities. The protocol was further extended to the synthesis of 3,3′‐bis(triazolyl thio‐/seleno)‐2,2′‐bipyridines by the reaction of tetraynes with 1‐alkynyl thio‐/selenocyanates in the presence of aryl/alkyl azides.magnified image
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