A method for aminoquinoline-directed, cobalt-promoted dimerization of benzamides has been developed. Reactions proceed in ethanol solvent in the presence of Mn(OAc)2 cocatalyst and Na2CO3 base and use oxygen as a terminal oxidant. Bromo, iodo, nitro, ether, and ester moieties are compatible with the reaction conditions. Cross-coupling of electronically dissimilar aminoquinoline benzamides proceeds with modest yields and selectivities.
Liene Grigorjeva, Olafs Daugulis. Cobalt-promoted dimerization of aminoquinoline benzamides. Organic letters. 2015 Mar 06;17(5):1204-7
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PMID: 25689275
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