Efficient Asymmetric Synthesis of Structurally Diverse P-Stereogenic Phosphinamides for Catalyst Design
作者:Zhengxu S. Han、Li Zhang、Yibo Xu、Joshua D. Sieber、Maurice A. Marsini、Zhibin Li、Jonathan T. Reeves、Keith R. Fandrick、Nitinchandra D. Patel、Jean-Nicolas Desrosiers、Bo Qu、Anji Chen、DiAndra M. Rudzinski、Lalith P. Samankumara、Shengli Ma、Nelu Grinberg、Frank Roschangar、Nathan K. Yee、Guijun Wang、Jinhua J. Song、Chris H. Senanayake
DOI:10.1002/anie.201500350
日期:2015.4.27
The use of chiral phosphinamides is relatively unexplored because of the lack of a general method for the synthesis. Reported herein is the development of a general, efficient, and highlyenantioselective method for the synthesis of structurally diverse P‐stereogenic phosphinamides. The method relies on nucleophilic substitution of a chiral phosphinate derived from the versatile chiral phosphinyl transfer
Diastereoselective alkynylation of chiral phosphinoylimines: preparation of optically active propargylamines
作者:Mounira Benamer、Serge Turcaud、Jacques Royer
DOI:10.1016/j.tetlet.2009.11.091
日期:2010.1
Chiral phosphinoylimines were prepared from methylphenylphosphonamides and tested as new chiral and activated imines. The addition of aluminum acetylides was proved to be highly diastereoselective while lithium or magnesium acetylides gave poor results. The cleavage of the chiral auxiliary was done under mild conditions and allows the recovery of the starting phosphonamide without loss of optical purity
New class of P-stereogenic chiral Brønsted acid catalysts derived from chiral phosphinamides
作者:Zhengxu S. Han、Hao Wu、Bo Qu、Yuwen Wang、Ling Wu、Li Zhang、Yibo Xu、Linglin Wu、Yongda Zhang、Heewon Lee、Frank Roschangar、Jeff J. Song、Chris H. Senanayake
DOI:10.1016/j.tetlet.2019.06.013
日期:2019.7
A new class of NH Brønsted acid organocatalysts that feature P-stereogenic chirality was developed. These catalysts were prepared from P-stereogenic chiral phosphinamides and show similar reactivity to BINOL derived phosphoric acid toward the reduction of quinolines via transfer hydrogenation. It shows that stereoselectivity is induced by the P-chiral environment that is created by the substituents
A number of P-stereogenic N-phosphinyl compounds were stereoselectively prepared in good yields by a straightforward approach, thanks to the diversified and, up until now, unexplored reactivity of (R)- and (S)-dicyclohexylidene-D-glucose methyl phenyl phosphinates toward metal amides. Under adequate conditions, structurally different phosphinamides with one or two P-chiral centers were obtained.