Abstract

Optisch aktive Epoxide erhält man hoch enantioselektiv aus Benzylidencyclobutanen mit Oxone (2KHSO5⋅KHSO4⋅K2SO4) als Oxidans und einem von Glucose abgeleiteten Keton als Katalysator. Die Lewis-Säure-katalysierte Umlagerung der Epoxide mit Et2AlCl oder LiI liefert α-Arylcyclopentanone mit hohen Enantiomerenüberschüssen (siehe Schema; Tol=Tolyl).

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