Asymmetric synthesis of congested spiro-cyclopentaneoxindoles via an organocatalytic cascade reactionNoole, Artur; Kanger, Tõnis248th ACS National Meeting and Exposition : August 10-14, 2014, San Francisco, CA : Chemistry and Global Stewardship2014 / [1] p. : ill Enantioselective organocatalytic Michael addition of cyclopentane-1,2-diones to electrophilesPreegel, Gert; Noole, Artur; Ilmarinen, Kaja; Järving, Ivar; Kanger, Tõnis; Pehk, Tõnis; Lopp, Margus248th ACS National Meeting and Exposition : August 10-14, 2014, San Francisco, CA : Chemistry and Global Stewardship2014 / [1] p. : ill