A Pd-Catalyzed Heteroannulation Approach to 2,3-Disubstituted Furo[3,2-<i>c</i>]coumarins
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The Pd-catalyzed cyclofunctionalization of 3-alkynyl-4-methoxycoumarins with aryl halides resulted in the selective formation of 3-arylfuro[3,2-c]coumarins in lieu of the expected regioisomeric 3-arylfuro[2,3-b]chromones. A mechanism involving the linear to angular rearrangement of a Pd-containing furan intermediate was proposed.
创建时间：
2016-02-25
