Asymmetric synthesis of chiral spiro bis(isoxazoline) and spiro (isoxazole–isoxazoline) ligands
摘要:
Asymmetric synthesis of novel chiral ligands, bis(isoxazoline) on a spiro[4.4]nonane scaffold and isoxazole-isoxazoline on a spiro[4.5]decane scaffold, has been achieved by utilizing an enantiomerically pure alcohol as the starting material. (C) 2010 Elsevier Ltd. All rights reserved.
Asymmetric synthesis of chiral spiro bis(isoxazoline) and spiro (isoxazole–isoxazoline) ligands
摘要:
Asymmetric synthesis of novel chiral ligands, bis(isoxazoline) on a spiro[4.4]nonane scaffold and isoxazole-isoxazoline on a spiro[4.5]decane scaffold, has been achieved by utilizing an enantiomerically pure alcohol as the starting material. (C) 2010 Elsevier Ltd. All rights reserved.
Nickel-Catalyzed Reduction of Secondary and Tertiary Amides
作者:Bryan J. Simmons、Marie Hoffmann、Jaeyeon Hwang、Moritz K. Jackl、Neil K. Garg
DOI:10.1021/acs.orglett.7b00683
日期:2017.4.7
The nickel-catalyzed reduction of secondary and tertiary amides to give amine products is reported. The transformation is tolerant of extensive variation with respect to the amide substrate, proceeds in the presence of esters and epimerizable stereocenters, and can be used to achieve the reduction of lactams. Moreover, this methodology provides a simple tactic for accessing medicinally relevant α-deuterated
[EN] METHODS FOR MAKING CYCLOHEXENE OXIDE-CONTAINING ESTERS<br/>[FR] PROCÉDÉS DE FABRICATION D'ESTERS CONTENANT DE L'OXYDE DE CYCLOHEXÈNE
申请人:ARKEMA INC
公开号:WO2018231804A1
公开(公告)日:2018-12-20
A method of making an ester comprised of at least one cyclohexene oxide moiety is provided, involving the steps of a) esterifying an alcohol with a carboxylic acid-substituted cyclohexene to obtain an intermediate comprised of at least one carboxylate-substituted cyclohexene moiety; and b) epoxidizing the intermediate obtained in step a) with an epoxidizing agent to obtain the ester comprised of at least one cyclohexene oxide moiety. The esters have utility as acid scavengers, plasticizers and reactive resins.
[EN] SYNTHESIS OF TETRACYCLINES AND ANALOGUES THEREOF<br/>[FR] SYNTHÈSE DE TÉTRACYCLINES ET D'ANALOGUES DE CELLES-CI
申请人:HARVARD COLLEGE
公开号:WO2007117639A2
公开(公告)日:2007-10-18
(EN) The tetracycline class of antibiotics has played a major role in the treatment of infectious diseases for the past 50 years. However, the increased use of the tetracyclines in human and veterinary medicine has led to resistance among many organisms previously susceptible to tetracycline antibiotics. The modular synthesis of tetracyclines and tetracycline analogs described provides an efficient and enantioselective route to a variety of tetracycline analogs and polycyclines previously inaccessible via earlier tetracycline syntheses and semi-synthetic methods. These analogs may be used as anti- microbial agents or anti-pro liferative agents in the treatment of diseases of humans or other animals.(FR) La classe d'antibiotiques des tétracyclines a joué un rôle majeur dans le traitement de maladies infectieuses au cours des 50 dernières années. Cependant, l'utilisation croissante de tétracyclines en médecine humaine et vétérinaire a conduit au développement d'une résistance au sein de nombreux organismes qui étaient auparavant sensibles aux antibiotiques de la famille des tétracyclines. La synthèse modulaire de tétracyclines et d'analogues de tétracyclines selon la présente invention permet d'obtenir de façon efficace et énantiosélective une variété d'analogues de tétracyclines et de polycyclines qu'il n'était pas possible d'obtenir par le biais de synthèses de tétracyclines de l'état antérieur de la technique et de procédés semi-synthétiques. Ces analogues peuvent être utilisés en tant qu'agents antimicrobiens ou en tant qu'agents antiprolifératifs dans le cadre du traitement de maladies chez l'être humain ou d'autres animaux.
Asymmetric synthesis of chiral spiro bis(isoxazoline) and spiro (isoxazole–isoxazoline) ligands
Asymmetric synthesis of novel chiral ligands, bis(isoxazoline) on a spiro[4.4]nonane scaffold and isoxazole-isoxazoline on a spiro[4.5]decane scaffold, has been achieved by utilizing an enantiomerically pure alcohol as the starting material. (C) 2010 Elsevier Ltd. All rights reserved.