Efficient Asymmetric Synthesis of P-Chiral Phosphine Oxides via Properly Designed and Activated Benzoxazaphosphinine-2-oxide Agents
摘要:
A general, efficient, and highly diastereoselective method for the synthesis of structurally and sterically diverse P-chiral phosphine oxides was developed. The method relies on sequential nucleophilic substitution on the versatile chiral phosphinyl transfer agent 1,3,2-benzoxazaphosphinine-2-oxide, which features enhanced and differentiated P N and P-O bond reactivity toward nucleophiles. The reactivities of both bonds are fine-tuned to allow cleavage to occur even with sterically hindered nucleophiles under mild conditions.
Sequential C–H Arylation and Enantioselective Hydrogenation Enables Ideal Asymmetric Entry to the Indenopiperidine Core of an 11β-HSD-1 Inhibitor
作者:Xudong Wei、Bo Qu、Xingzhong Zeng、Jolaine Savoie、Keith R. Fandrick、Jean-Nicolas Desrosiers、Sergei Tcyrulnikov、Maurice A. Marsini、Frederic G. Buono、Zhibin Li、Bing-Shiou Yang、Wenjun Tang、Nizar Haddad、Osvaldo Gutierrez、Jun Wang、Heewon Lee、Shengli Ma、Scot Campbell、Jon C. Lorenz、Matthias Eckhardt、Frank Himmelsbach、Stefan Peters、Nitinchandra D. Patel、Zhulin Tan、Nathan K. Yee、Jinhua J. Song、Frank Roschangar、Marisa C. Kozlowski、Chris H. Senanayake
DOI:10.1021/jacs.6b09764
日期:2016.11.30
A concise asymmetric synthesis of an 11β-HSD-1 inhibitor has been achieved using inexpensive starting materials with excellent step-economy at low catalyst loadings. The catalytic enantioselectivetotalsynthesis of 1 was accomplished in 7 steps and 38% overall yield aided by the development of an innovative, sequential strategy involving Pd-catalyzed pyridinium C-H arylation and Ir-catalyzed asymmetric
PROCESS FOR MAKING NOVEL CHIRAL PHOSPHORUS LIGANDS
申请人:Boehringer Ingelheim International GmbH
公开号:EP2920189B1
公开(公告)日:2017-08-02
US8816112B2
申请人:——
公开号:US8816112B2
公开(公告)日:2014-08-26
[EN] PROCESS FOR MAKING NOVEL CHIRAL PHOSPHORUS LIGANDS<br/>[FR] PROCÉDÉ POUR FABRIQUER DE NOUVEAUX LIGANDS DU PHOSPHORE CHIRAUX
申请人:BOEHRINGER INGELHEIM INT
公开号:WO2014078491A1
公开(公告)日:2014-05-22
Disclosed are methods for making chiral phosphorus ligands including chiral phosphines, chiral phosphine oxides, phosphonamides, and aminophosphines. The chiral phosphorus ligands prepared by the methods of the invention are useful as components of chiral catalysts, e.g., transition metal complexes.