Journal
ORGANIC LETTERS
Volume 5, Issue 17, Pages 3131-3134Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol035188g
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A short and convergent synthesis of 2-aryl-6-chloronicotinamides via regioselective Suzuki coupling of 2,6-dichloronicotinamide with aryl boronic acids is described. Regloselectivity was achieved by chelation of the palladium(0) species to an ester/amide group. The air-stable palladium catalyst PXPd2, when used in reagent-grade methanol with K2CO3 as the base, afforded the best regioselectivity and shortest reaction times among the catalysts screened.
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