Regioselective Synthesis of 4,5-Dihydro-6<i>H</i>
-oxepino[3,2-<i>c</i>
]chromene-2,6(3<i>H</i>
)-diones through Palladium-Catalyzed Intramolecular Alkoxycarbonylation of 3-Allyl-4-hydroxycoumarins
作者:D. Oliver Sosa、Karla Almaraz、Manuel Amézquita-Valencia
DOI:10.1002/ejoc.201900649
日期:2019.8.7
This work presents a regioselective route to synthesize seven‐membered ring lactones fused to coumarin scaffold in good yields and high regioselectivity. Additionality, the carbonylation reaction does not require acidic conditions and proceeds in the absence of any other additive such as hydrogen (H2).