Staring from readily available polysubstituted allylic chlorides, a range of polysubstituted allyliczinc chlorides were obtained using a LiCl-mediated zinc dust insertion in 55−84% yield. A highly diastereoselective synthesis of homoallylic alcohols bearing up to two adjacent quaternary centers was achieved using these polysubstituted allyliczinc reagents.
[EN] PROTEASOME INHIBITING ß-LACTAM PRODRUGS USEFUL FOR THE TREATMENT OF CANCER AND NEURODEGENERATIVE DISORDERS<br/>[FR] PROMÉDICAMENTS À BASE DE SS-LACTAME INHIBITEURS DU PROTÉASOME UTILES POUR LE TRAITEMENT DU CANCER ET DE TROUBLES NEURODÉGÉNÉRATIFS
申请人:VITA API
公开号:WO2018115497A1
公开(公告)日:2018-06-28
The present invention relates generally to proteasome inhibiting β-lactam compounds useful for the treatment of cancer and neurodegenerative disorders. The invention also provides pharmaceutical compositions and extended release formulations of said compounds, and medical uses of said compounds and/or pharmaceutical compositions to treat cancer and neurodegenerative disorders.
Development of a Catalytic Platform for Nucleophilic Substitution: Cyclopropenone-Catalyzed Chlorodehydration of Alcohols
作者:Christine M. Vanos、Tristan H. Lambert
DOI:10.1002/anie.201104638
日期:2011.12.16
Cyclopropenone makes the switch: 2,3‐Bis‐(p‐methoxyphenyl)cyclopropenone is a highly efficient catalyst for the chlorodehydration of 20 diverse alcohol substrates (see scheme; X=Cl). With oxalyl chloride as catalytic activator, this nucleophilicsubstitution proceeded through cyclopropenium‐activated intermediates and resulted in complete stereochemical inversion in substrates with chiral centers.
环丙烯酮起到了作用:2,3-双(对甲氧基苯基)环丙烯酮是一种高效的催化剂,可对20种不同的醇底物进行氯脱水(参见方案; X = Cl)。用草酰氯作为催化活化剂,这种亲核取代过程通过环丙烯活化的中间体进行,并导致具有手性中心的底物完全立体化学转化。
Lewis Acids Promoted 3 + 2 Cycloaddition of Oxaziridines and Cyclic Allylic Alcohols through Carbonyl Imine Intermediates
作者:Erbao Zhao、Feilong Zhou、Yujun Zhao
DOI:10.1021/acs.joc.9b00246
日期:2019.4.5
Syntheses of isoxazolidines through the carbonyl imine intermediates are currently limited to monosubstituted olefin substrates. Herein, we reported syntheses of novel bicyclic isoxazolidine-containing compounds through 1,3-dipolar cycloaddition reactions using cyclic allylicalcohols as substrates, which proved challenging in previous reports. Generally, the reaction yields range from good to high
[EN] TRIAZOLYL DERIVATIVES AS SYK INHIBITORS<br/>[FR] DÉRIVÉS TRIAZOLYLE EN TANT QU'INHIBITEURS DE LA SYK
申请人:MERCK SHARP & DOHME
公开号:WO2014048065A1
公开(公告)日:2014-04-03
Provided are triazole derivatives of Formula I which are potent inhibitors of spleen tyrosine kinase and pharmaceutical composition. The triazole derivatives are useful in the treatment and prevention of diseases mediated by said enzyme, such as asthma, COPD, rheumatoid arthritis, and cancer.