A Highly Enantioselective Catalyst for the Asymmetric Nozaki–Hiyama–Kishi Reaction of Allylic and Vinylic Halides
作者:Albrecht Berkessel、Dirk Menche、Christoph A. Sklorz、Michael Schröder、Ian Paterson
DOI:10.1002/anie.200390265
日期:2003.3.3
Enantioselective Synthesis of DIANANE, a Novel <i>C</i><sub>2</sub>-Symmetric Chiral Diamine for Asymmetric Catalysis
作者:Albrecht Berkessel、Michael Schröder、Christoph A. Sklorz、Stefania Tabanella、Nadine Vogl、Johann Lex、Jörg M. Neudörfl
DOI:10.1021/jo035841d
日期:2004.4.1
the use of hydrogen peroxide in the form of its urea clathrate instead of aqueous solution proved beneficial. By the above sequence, enantiomerically pure (ee ≥99%) DIANANE was obtained from norbornadiene in 40−50% overall yield. The relative and absolute configuration of DIANANE was confirmed by X-ray crystallography of the DIANANE bis-tosylamide, and of its bis-camphorsulfonamide. Furthermore, the synthesis