使用衍生自稳定的螺硼酸酯,通过硼烷介导的单一异构体 ( E )- 和 ( Z ) -O-苄基肟醚的还原,合成了高对映体纯的 (1-芳基)-和 (1-萘基)-1-乙胺( S )-二苯基缬氨醇和乙二醇作为手性催化剂。伯 ( R )-芳基乙胺是通过使用 15% 的催化剂将纯 ( Z )-乙酮肟醚还原至 99% ee来制备的。描述了使用对映纯(1-萘-1-基)乙胺作为手性前体合成新的和已知的拟钙剂类似物的两种方便且容易的方法。
Modular POP Ligands in Rhodium-Mediated Asymmetric Hydrogenation: A Comparative Catalysis Study
作者:José L. Núñez-Rico、Pablo Etayo、Héctor Fernández-Pérez、Anton Vidal-Ferran
DOI:10.1002/adsc.201200477
日期:2012.11.12
Highly efficient and enantioselectivehydrogenation reactions for α-(acylamino)acrylates, itaconic acid derivatives and analogues, α-substituted enolester derivatives, and α-arylenamides (25 substrates) catalyzed by chiral cationic rhodium complexes of a set of POP ligands have been developed. The catalytic systems derived from these POP ligands provided a straightforward access to enantiomerically
Tricycloundecane compounds useful as modulators of nuclear hormone receptor function
申请人:Balog Aaron James
公开号:US20070088029A1
公开(公告)日:2007-04-19
Tricycloundecanes compounds, methods of using such compounds in the treatment of nuclear hormone receptor-associated conditions such as cancer and immune disorders, and pharmaceutical compositions containing such compounds are disclosed.
Nanomole-Scale Assignment of Configuration for Primary Amines Using a Kinetic Resolution Strategy
作者:Shawn M. Miller、Renzo A. Samame、Scott D. Rychnovsky
DOI:10.1021/ja310620c
日期:2012.12.19
The absolute configurations of primary amines were assigned using a kinetic resolution strategy with Mioskowski's enantioselective 1-(R,R) and 2-(S,S) acylating agents. A simple mnemonic was developed to determine the configuration. A pseudoenantiomeric pair of reagents, 1-(R,R) and 2-(S,S)-d(3), was prepared and used to assay primary amines on a micromolar scale. The ESI-MS readout of the resulting
Practical Enantioselective Hydrogenation of α-Aryl- and α-Carboxyamidoethylenes by Rhodium(I)-{1,2-Bis[(<i>o</i>-<i>tert</i>-butoxyphenyl)(phenyl)phosphino]ethane}
作者:Barbara Mohar、Michel Stephan
DOI:10.1002/adsc.201200780
日期:——
The rhodium(I)-1,2-bis[(o-tert-butoxyphenyl)(phenyl)phosphino]ethane} [Rh(I)-(t-Bu-SMS-Phos)] catalyst system displayed prime efficiency in the hydrogenation of large series of α-amidostyrenes and α-amidoacrylates. Up to >99.9% enantiomeric excesses coupled with very high reaction rates were attained operating routinely under 1–10 bar of hydrogen at 22 °C in methanol. Examples include industrial substrates
Enantioselective Access to Chiral Drugs by using Asymmetric Hydrogenation Catalyzed by Rh(POP) Complexes
作者:Pablo Etayo、José Luis Núñez-Rico、Héctor Fernández-Pérez、Anton Vidal-Ferran
DOI:10.1002/chem.201103014
日期:2011.12.9
POP art: Rhodium complexes of POP ligands serve as highly efficient and enantioselective catalysts in asymmetrichydrogenation leading to various valuable pharmaceutical building blocks and several direct precursors of chiraldrugs such as LY2497282, lacosamide, rivastigmine, and aprepitant and 12 further examples (see scheme; nbd=norbornadiene; XC(O)G=NHAc, NHBoc, NHCbz, 2‐oxopyrrolidin‐1‐yl, OAc)
P OP艺术:P的铑络合物 OP配体充当在不对称氢化作为高效和对映选择性的催化剂导致各种有价值的药物积木和手性药物如LY2497282,拉考沙胺,利凡斯的明,和阿瑞匹坦和12个进一步示例几个直接前体(参见方案; nbd =降冰片二烯; XC(O)G = NHAc,NHBoc,NHCbz,2-氧吡咯烷-1--1-基,OAc)。