Copper-Catalysed Asymmetric 1,4-Addition of Organozinc Compounds to Linear Aliphatic Enones Using 2,2′-Dihydroxy 3,3′-Dithioether Derivatives of 1,1′-Binaphthalene
bearing a sulfide at the 5 position] produced a reagent that gave up to 54% ee in the epoxidation process. The same system was applied to the preparation of terminal aziridines from imines. The optimum group on nitrogen was a sulfonyl group, although groups capable of chelation of zinc (o-methoxyphenyl) were also effective. Attempts to render the aziridination process asymmetric by using the above strategy
Copper-Catalysed Asymmetric 1,4-Addition of Organozinc Compounds to Linear Aliphatic Enones Using 2,2′-Dihydroxy 3,3′-Dithioether Derivatives of 1,1′-Binaphthalene
作者:Christoph Börner、Michael R. Dennis、Ekkehard Sinn、Simon Woodward