A sustainable and scalable protocol for synthesizing variously functionalized sulfonamides, from amines and sulfonyl chlorides, has been developed using environmentally responsible and reusable choline chloride (ChCl)‐based deep eutectic solvents (DESs). In ChCl/glycerol (1:2 mol mol–1) and ChCl/urea (1:2 mol mol–1), these reactions yield up to 97% under aerobic conditions at ambient temperature within 2–12 h. The practicality of the method is exemplified by the sustainable synthesis of an FFA4 agonist and a key building block en route to anti‐Alzheimer drug BMS‐299897. A subtle interplay of electronic effects and the solubility characteristics of the starting materials in the aforementioned DESs seem to be responsible for driving the reaction successfully over the hydrolysis of sulfonyl chlorides. The procedure’s eco‐friendliness is validated by quantitative metrics like the E‐factor and the EcoScale, with products isolated by extraction or filtration after decantation.
[EN] COMPOSITIONS AND METHODS COMPRISING PROTEINASE ACTIVATED RECEPTOR ANTAGONISTS<br/>[FR] COMPOSITIONS ET METHODES COMPRENANT L'UTILISATION D'ANTAGONISTES DU RECEPTEUR ACTIVE PAR DES PROTEASES
申请人:ENTREMED INC
公开号:WO2007076055A2
公开(公告)日:2007-07-05
(EN) Compositions and methods comprising proteinase activated receptor antagonists are provided. More particularly, the present invention relates to the use of proteins, peptides and molecules that bind to proteinase activated receptor 2, and inhibit the processes associated with the activation of that receptor. More specifically, the present invention provides novel compositions and methods for the treatment of disorders and diseases such as those associated with abnormal cellular proliferation, angiogenesis, inflammation and cancer.(FR) L'invention se rapporte à des compositions et à des méthodes comprenant l'utilisation d'antagonistes du récepteur activé par les protéases. Elle concerne plus particulièrement l'utilisation de protéines, de peptides et de molécules qui se lient au récepteur activé par les protéases et inhibent les processus associés à l'activation de ce récepteur. De manière plus spécifique, l'invention concerne de nouvelles compositions et de nouvelles méthodes de traitement d'affections et de pathologies telles que celles qui sont liées à une prolifération cellulaire anormale, une angiogenèse, une inflammation ou un cancer.
Catalyst shuttling enabled by a thermoresponsive polymeric ligand: facilitating efficient cross-couplings with continuously recyclable ppm levels of palladium
作者:Erfei Wang、Mao Chen
DOI:10.1039/c9sc02171j
日期:——
A polymeric monophosphine ligand WePhos has been synthesized and complexed with palladium(II) acetate [Pd(OAc)2] to generate a thermoresponsive pre-catalyst that can shuttle between water and organic phases, with the change being regulated by temperature. The structure of the polymeric ligand was confirmed with matrix-assisted laser desorption/ionization-time-of-flight (MALDI-TOF) mass spectrometry