Journal
ORGANIC LETTERS
Volume 17, Issue 16, Pages 4002-4005Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.5b01870
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- National Institutes of Health [CA042056]
- NSF
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The examination of the cycloaddition reactions of 1,2,3-triazines 17-19, bearing electron-donating substituents at CS, are described. Despite the noncomplementary 1,2,3-triazine CS substituents, amidines were found to undergo a powerful cycloaddition to provide 2,5-disubstituted pyrimidines in excellent yields (42-99%; EDG = SMe > OMe > NHAc). Even select ynamines and enamines were capable of cycloadditions with 17, but not 18 or 19, to provide trisubstituted pyridines in modest yields (37-40% and 33% respectively).
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