Royal Society of Chemistry, Chemical Science, 13(10), p. 3765-3769, 2019
DOI: 10.1039/c8sc05581e
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Chiral phosphoric acid catalyzed the formal [4+2]-cycloaddition of 2-benzothiazolimines with enecarbamates to provide benzothiazolopyrimidines with up to 99% yield and >99% ee.