Asymmetric Synthesis of Sulfinamides Using (−)-Quinine as Chiral Auxiliary
摘要:
A process has been designed and demonstrated for the asymmetric synthesis of sulfinamides using quinine as auxiliary. A variety of chiral sulfinamides including N-alkyl sulfinamides with diverse structure were prepared in good yields and excellent enantioselectivity starting from easily available and inexpensive reagents. The auxiliary quinine could be recovered and recycled.
Triisopropyl borate mediated N -sulfinyl imine formation
作者:Michael D. Visco、Jonathan T. Reeves、Maurice A. Marsini、Ivan Volchkov、Carl A. Busacca、Anita E. Mattson、Chris H. Senanayake
DOI:10.1016/j.tetlet.2016.03.063
日期:2016.4
Triisopropyl borate effects the condensation of aldehydes with sulfinamides to give N-sulfinyl imines. The reaction is amenable to 1°, 2°, and 3° alkyl aldehydes, as well as aryl, heteroaryl, and α,β-unsaturated aldehydes. In addition to tert-butanesulfinamide, the condensation is also effective with 4-toluenesulfinamide and 2,4,6-triisopropylphenylsulfinamide. This protocol proceeds under homogeneous
One-Step Diastereoselective Pyrrolidine Synthesis Using a Sulfinamide Annulating Reagent
作者:Qing Shi、Nathaniel S. Greenwood、Mariah C. Meehan、Hyunsoo Park、Michael Galella、Bhupinder Sandhu、Purnima Khandelwal、John R. Coombs、William P. Gallagher、Carlos A. Guerrero、John Hynes、T. G. Murali Dhar、Francisco Gonzalez Bobes、David Marcoux
DOI:10.1021/acs.orglett.9b03560
日期:2019.11.15
highlights the use of chiral sulfinamides as nitrogen nucleophiles in intermolecular aza-Michael reactions. When chiral sulfinamides are coupled to a chloroethyl group, the corresponding novel annulating reagents can be used to streamline the stereoselective synthesis of complex pyrrolidine-containing molecules. As a result, it has enabled a medicinal chemistry campaign for the synthesis of biologically
Carbamoyl Anion Addition to <i>N</i>-Sulfinyl Imines: Highly Diastereoselective Synthesis of α-Amino Amides
作者:Jonathan T. Reeves、Zhulin Tan、Melissa A. Herbage、Zhengxu S. Han、Maurice A. Marsini、Zhibin Li、Guisheng Li、Yibo Xu、Keith R. Fandrick、Nina C. Gonnella、Scot Campbell、Shengli Ma、Nelu Grinberg、Heewon Lee、Bruce Z. Lu、Chris H. Senanayake
DOI:10.1021/ja402647m
日期:2013.4.17
Carbamoyl anions, generated from N,N-disubstituted formamides and lithium diisopropylamide, add with high diastereoselectivity to chiral N-sulfinyl aldimines and ketimines to provide α-amino amides. The methodology enables the direct introduction of a carbonylgroup without the requirement of unmasking steps as with other nucleophiles. The products may be converted to α-amino esters or 1,2-diamines
Asymmetric radical alkylation of N-sulfinimines under visible light photocatalytic conditions
作者:Alberto F. Garrido-Castro、Houcine Choubane、Mortada Daaou、M. Carmen Maestro、José Alemán
DOI:10.1039/c7cc03724d
日期:——
derivatives to N-sulfinimines with complete diastereoselectivity and moderate to good yields is presented. This is the first asymmetric photocatalytic addition to N-sulfinimines under visible light irradiation with smooth conditions and functional group tolerance.
[EN] HUMAN PLASMA KALLIKREIN INHIBITORS<br/>[FR] INHIBITEURS DE LA KALLICRÉINE PLASMATIQUE HUMAINE
申请人:BIOCRYST PHARM INC
公开号:WO2015134998A1
公开(公告)日:2015-09-11
Disclosed are compounds of formula (I), as described herein, and pharmaceutically acceptable salts thereof. The compounds are inhibitors of plasma kallikrein. Also provided are pharmaceutical compositions comprising at least one compound of the invention, and methods involving use of the compounds and compositions of the invention in the treatment and prevention of diseases and conditions characterized by unwanted plasma kallikrein activity.