SCHEDULED MAINTENANCE
A new method for the synthesis of pyran fused coumarins by 3-bromo-4-hydroxycoumarins as cyclic α-halo ketones based on an organocatalyst assisted three-component tandem reaction is investigated. To the best of our knowledge, cyclic α-halo ketones have not yet been used for the synthesis of pyran fused coumarins.
S. Ahadi, M. Zolghadr, H. R. Khavasi and A. Bazgir, Org. Biomol. Chem., 2013, 11, 279 DOI: 10.1039/C2OB26203G
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