The Relative Reactivities of the Isomeric Methyl Pyridinecarboxylates in the Acylation of Certain Ketones. The Synthesis of β-Diketones Containing Pyridine Rings
Robert Levine, James K. Sneed
J. Am. Chem. Soc., 1951, 73 (12), pp 5614–5616
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http://dx.doi.org/10.1021/ja01156a035