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  • 2020, 40(1)

    25 January 2020

    Cover illustration

    The naturally occurring cinchona alkaloids are well known for their medicinal use.This kind of alkaloids and their derivatives have recently proven to be efficient chiral organocatalysts.On page 40, highly enantioselective syntheses of functionalized 3,3-spirocmyclopropyl oxindoles and vinylcyclopropanes are reported by Luo, Geng, Cao, and He via ethylated quinidine catalytic cyclopropanations of α-bromoketones.

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