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Pure Appl. Chem., 2000, Vol. 72, No. 9, pp. 1623-1629

Stereoselective C,C-bond formation. Cyclizations of biradicals

Bernd Giese, Frédérique Barbosa, Christian Stähelin, Stefan Sauer, Philipp Wettstein and Caroline Wyss

Department of Chemistry, University of Basel, St. Johanns Ring 19, CH-4056 Basel, Switzerland

Abstract: The formation of C,C-bonds via photolytically generated biradicals can occur with high stereoselectivity. If triplet biradicals are involved, chiral induction is highly likely. Syntheses that occur only via singlet biradicals have a good chance to show a memory effect of chirality.