Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 75, Issue 15, Pages 5398-5401Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jo101027h
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The scope and limitations of using palladium-catalyzed cross-coupling reactions of diverse butyl metal species with two different 2-halopurines were evaluated. While tributylboranes reacted readily and regioselectively with both 2-chloro-6-dibenzylaminopurines and 2-iodo-6-chloropurines, all the other alkyl metal species were much less reactive and gave very poor yield and/or selectivity of the desired product. This protocol was applied to the synthesis of an important adenosine A(2A) receptor antagonist, ST1535.
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