Suga Hiroyuki, Ishimoto Daisuke, Higuchi Satoshi, Ohtsuka Motoo, Arikawa Tadashi, Tsuchida Teruko, Kakehi Akikazu, Baba Toshihide
Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, Wakasato, Nagano 380-8553, Japan.
Org Lett. 2007 Oct 11;9(21):4359-62. doi: 10.1021/ol701936b. Epub 2007 Sep 20.
We have found the first successful example of reverse-electron-demand dipole-LUMO/dipolarophile-HOMO controlled cycloaddition reactions between carbonyl ylides, which were generated from o-methoxycarbonyl-alpha-diazoacetophenone and their acyl derivatives as precursors, and vinyl ether derivatives with high levels of asymmetric induction (97-77% ee) using chiral 2,6-(oxazolinyl)pyridine-Eu(III) or binaphthyldiimine-Ni(II) complexes as chiral Lewis acid catalysts.