Synthesis of Ketones and Esters from Heteroatom-Functionalized Alkenes by Cobalt-Mediated Hydrogen Atom Transfer
作者:Xiaoshen Ma、Seth B. Herzon
DOI:10.1021/acs.joc.6b01709
日期:2016.10.7
Cobalt bis(acetylacetonate) is shown to mediate hydrogen atom transfer to a broad range of functionalized alkenes; in situ oxidation of the resulting alkylradical intermediates, followed by hydrolysis, provides expedient access to ketones and esters. By modification of the alcohol solvent, different alkyl ester products may be obtained. The method is compatible with a number of functional groups including
[EN] NEW TRIAZOLYL DERIVATIVES AS GABA A ALPHA5 PAM<br/>[FR] NOUVEAUX DÉRIVÉS TRIAZOLYLES UTILISÉS EN TANT QUE GABA A ALPHA5 PAM
申请人:HOFFMANN LA ROCHE
公开号:WO2021228795A1
公开(公告)日:2021-11-18
The invention provides novel compounds having the general formula (I) or (II) wherein R1, R2, R3, X, Y and Z are as described herein, compositions including the compounds and methods of using the compounds.
Swapped selectivities: The use of tailor‐made catalysts results in anomalous endo/exo selectivities and high enantioselectivities in the Diels–Alder reactions of cyclopentadiene with different acroleins (see scheme). These supramolecular catalysts are prepared in situ from chiral diols, arylboronic acid, and tris(pentafluorophenyl)borane, and can discriminate the re/si face of the dienophile as well
[EN] DIHYDROPYRIMIDINE DERIVATIVES AND USES THEREOF IN THE TREATMENT OF HBV INFECTION OR OF HBV-INDUCED DISEASES<br/>[FR] DÉRIVÉS DE DIHYDROPYRIMIDINE ET LEURS UTILISATIONS DANS LE TRAITEMENT D'UNE INFECTION PAR LE VIRUS DE L'HÉPATITE B OU DE MALADIES INDUITES PAR LE VIRUS DE L'HÉPATITE B
申请人:JANSSEN SCIENCES IRELAND UNLIMITED CO
公开号:WO2021018237A1
公开(公告)日:2021-02-04
Provided are dihydropyrimidine derivatives which are useful in the treatment or prevention of HBV infection or of HBV-induced diseases, more particularly of HBV chronic infection or of diseases induced by HBV chronic infection, as well as pharmaceutical or medical applications thereof.
Traversing Steric Limitations by Cooperative Lewis Base/Palladium Catalysis: An Enantioselective Synthesis of α‐Branched Esters Using 2‐Substituted Allyl Electrophiles
作者:Kevin J. Schwarz、Colin M. Pearson、Gabriel A. Cintron‐Rosado、Peng Liu、Thomas N. Snaddon
DOI:10.1002/anie.201803277
日期:2018.6.25
Cooperative catalysis enables the direct enantioselective α‐allylation of linear prochiral esters with 2‐substituted allyl electrophiles. Critical to the successful development of the method was the recognition that metal‐centered reactivity and the source of enantiocontrol are independent. This feature is unique to simultaneous catalysis events and permits logical tuning of the supporting ligands