SULFONAMIDE-BASED ORGANOCATALYSTS AND METHOD FOR THEIR USE
申请人:Carter Rich Garrett
公开号:US20100184986A1
公开(公告)日:2010-07-22
Organocatalysts, particularly proline sulfonamide organocatalysts, having a first general formula as follows are disclosed.
Embodiments of a method for using these organocatalysts also are disclosed. The method comprises providing a disclosed organocatalyst, and performing a reaction, often an enantioselective or diastereoselective reaction, using the organocatalyst. Solely by way of example, disclosed catalysts can be used to perform aldol reactions, conjugate additions, Michael additions, Robinson annulations, Mannich reactions, α-aminooxylations, α-hydroxyaminations, α-aminations and alkylation reactions. Certain of such reactions are intramolecular cyclizations used to form cyclic compounds, such as 5- or 6-membered rings, having one or more chiral centers. Disclosed organocatalysts generally are much more soluble in typical solvents used for organic synthesis than are known compounds. Moreover, the reaction yield is generally quite good with disclosed compounds, as is their enantioselective and diastereoselective effectiveness.
Organocatalysis of asymmetric aldol reaction in water: comparison of catalytic properties of (S)-valine and (S)-proline amides
作者:A. S. Kucherenko、D. E. Siyutkin、R. R. Dashkin、S. G. Zlotin
DOI:10.1007/s11172-013-0132-z
日期:2013.4
(S)-Valine amides containing (S)- or (R)-α-phenylethyl substituents at N1 atom efficiently catalyze asymmetric aldol reactions between cyclic (heterocyclic) ketones and aromatic aldehydes in water, predominantly giving rise to the aldol anti-diastereomers in high yields (up to 98%) and enantiomeric excess (up to 94%).
Organocatalytic asymmetric aldol reaction in the presence of water
作者:Dorota Gryko、Wojciech J. Saletra
DOI:10.1039/b703254d
日期:——
addition in the presence of water. Furthermore, different 'salting-out' and 'salting-in' salts were investigated and it was proven that the rate of acceleration and the stereochemical outcome of the reaction are affected by hydrophobic aggregation. Scope and limitation studies revealed that electron deficient aldehydes afforded aldol products with high stereoselectivity in the presence of 1-Cl(2)CHCO(2)H
Remote Substituent Effects on the Stereoselectivity and Organocatalytic Activity of Densely Substituted Unnatural Proline Esters in Aldol Reactions
作者:María de Gracia Retamosa、Abel de Cózar、Mirian Sánchez、José I. Miranda、José M. Sansano、Luis M. Castelló、Carmen Nájera、Ana I. Jiménez、Francisco J. Sayago、Carlos Cativiela、Fernando P. Cossío
DOI:10.1002/ejoc.201500160
日期:2015.4
Financial support was provided by the Spanish Ministerio de Economia y Competitividad (MINECO) and the Fondo Europeo de Desarrollo Regional (FEDER) (projects CTQ2010-16959/BQU, CTQ2012-35535, CTQ2013-40855-R, CTQ2007-62771/BQU, CTQ2010-20387, CTQ2010-17436, and Consolider-Ingenio CSD2007-00006), the University of the Basque Country (UPV/EHU, UFI11/22 QOSYC), the Basque Government (GV/EJ, grant IT-324-07)
财政支持由西班牙经济与竞争部 (MINECO) 和 Fondo Europeo de Desarrollo Regional (FEDER) 提供(项目 CTQ2010-16959/BQU、CTQ2012-35535、CTQ2013-40855-R、CTQ2007/BQU102 -20387、CTQ2010-17436 和 Consolider-Ingenio CSD2007-00006)、巴斯克地区大学(UPV/EHU、UFI11/22 QOSYC)、巴斯克政府(GV/EJ,授予 IT-324-07)、 Generalitat Valenciana-FEDER (PROMETEO/2009/039)、Gobierno de Aragon-FSE(研究组 E40)和阿利坎特大学。M. D. GR 感谢 Donostia 国际物理中心 (DIPC) 的博士后合同。MS 和 LC 非常感谢 MINECO
Catalytic Anions Embedded into Avidin: Importance of Their Chirality and the Chiral Environment on the Stereocontrol of the Aldol Reaction
作者:Vincent Gauchot、Andreea R. Schmitzer
DOI:10.1021/jo5002406
日期:2014.3.21
Several catalytic anions bearing a pseudo-dipeptide scaffold, in combination with a biotinylated imidazolium cation, were prepared. The assembly of these salts with avidin resulted in the formation of stable biohybridcatalysts, active in ionicliquid/aqueous media for the aldol reaction. By using natural and non-natural amino alcohols as “side chains” for the proline derivative anion, we studied the