The dilauroyl peroxide (DLP)-promoted carboannulation of alkynoates with xanthates was developed, affording a series of 4-aryl-3-(β-carbonyl) coumarins in moderate to good yields. The difunctionalization of alkynoates was achieved via a radical addition/cyclization process under metal-free conditions.
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| http://dx.doi.org/10.1039/c6ob01732k | DOI Listing |
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