Latest documents http://publikationen.ub.uni-frankfurt.de/index/index/ Thu, 25 Sep 2008 16:05:19 +0200 Thu, 25 Sep 2008 16:05:19 +0200 http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/5844 C2-symmetric bisamidines 8 have been tested as chiral Brønsted bases in the Diels- Alder reaction of anthrones and N-substituted maleimides. High yields of cycloadducts and significant asymmetric inductions up to 76% ee are accessible. The proposed mechanism involves proton transfer between anthrone and bisamidine, association of the resulting ions and finally a cycloaddition step stereoselectively controlled by the chiral ion pair. Deniz Akalay; Gerd Dürner; Jan W. Bats; Michael W. Göbel article http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/5844 Thu, 25 Sep 2008 16:05:19 +0200