Synthetic Communications p. 1765 - 1771 (2010)
Update date:2022-08-04
Topics: Efficiency Demethylation Aryl Scalable Chromen-2-one Methyl ethers Experimental process 6-(2,4-dimethoxybenzoyl)chromen-2-one
Srivastava, Amit
Yang, Jason
Zhao, Baoshu
Jiang, Yong
Blackmon, Wade
Kraemer, Bernd
Demethylation of 6-(2,4-dimethoxybenzoyl)chromen-2-one and some other aryl methyl ethers was achieved with pyridinium bromide as demethylating agent and sulfolane as solvent. Compared with other demethylation methods, this combination offers advantages of clean conversion, excellent yields, easy operation and workup, and manageable reaction temperatures. This process could be particularly useful for large-scale production because it avoids use of corrosive or moisture-sensitive reagents. Copyright
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