科研之友
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摘要
A transition-metal-free one-pot procedure for the difunctionalization of alkynes by C-C triple bond oxidation and transformation towards chromone derivatives has been developed. It involves cascade reactions for carbonylation of alkynes, base-promoted C-C & sigma;-bond cleavage, and intramolecular cyclization. This procedure provides an efficient protocol for the synthesis of polysubstituted chromones from readily available starting materials.
