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Dipole-LUMO/dipolarophile-HOMO controlled asymmetric cycloadditions of carbonyl ylides catalyzed by chiral Lewis acids.

作者信息

Suga Hiroyuki, Ishimoto Daisuke, Higuchi Satoshi, Ohtsuka Motoo, Arikawa Tadashi, Tsuchida Teruko, Kakehi Akikazu, Baba Toshihide

机构信息

Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, Wakasato, Nagano 380-8553, Japan.

出版信息

Org Lett. 2007 Oct 11;9(21):4359-62. doi: 10.1021/ol701936b. Epub 2007 Sep 20.

DOI:10.1021/ol701936b
PMID:17880234
Abstract

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.

摘要

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