Brassinosteroids (BRs) are phytohormones that control several important agronomic traits, such as flowering, plant architecture, seed yield, and stress tolerance. To manipulate the BR levels in plant tissues using specific inhibitors of BR biosynthesis, a series of novel azole derivatives were synthesized and their inhibitory activity on BR biosynthesis was investigated. Structure–activity relationship
作者:Chetan C. Chintawar、Amit K. Yadav、Nitin T. Patil
DOI:10.1002/anie.202002141
日期:2020.7.13
Herein, we disclose the gold‐catalyzed 1,2‐diarylation of alkenes through the interplay of ligand‐enabled AuI/AuIII catalysis with the idiosyncratic π‐activation mode of gold complexes. Unlike the classical migratory‐insertion‐based approach to 1,2‐diarylation, the present approach not only circumvents the formation of direct Ar−Ar′ coupling and Heck‐type side products but more intriguingly demonstrates
本文中,我们通过配体使能的Au I / Au III催化与金配合物的特质π活化模式的相互作用揭示了金的烯烃1,2-二芳基化反应。与经典的基于迁移插入的方法进行1,2-二芳基化不同,本方法不仅规避了直接Ar-Ar'偶联和Heck型副产物的形成,而且更有趣地证明了其反应性和选择性与先前已知的互补金属催化(Pd,Ni或Cu)。对机理进行详细研究的结果表明,由于芳基烯烃具有非清白的性质,芳基碘化物向Au I络合物的氧化加成是限速步骤。
Removal of the phosphate group in mechanism-based inhibitors of inositol monophosphatase leads to unusual inhibitory activity
作者:David J. Miller、M. Bashir-Uddin Surfraz、Mahmoud Akhtar、David Gani、Rudolf K. Allemann
DOI:10.1039/b312808c
日期:——
Inositolmonophosphatase is widely held to be the therapeutic target for inhibition by lithium ion in the treatment of bipolar disorder. In a continued effort to improve the bioavailability of alternative inhibitors, we have designed and tested two new series of compounds; phosphonates and product-like mimics. Phosphonate substrate mimics were competitiveinhibitors of reduced potency as compared to
[EN] CATALYTIC CONVERSION OF BIOMASS TO BIOPHENOL<br/>[FR] CONVERSION CATALYTIQUE DE BIOMASSE EN BIOPHÉNOL
申请人:UNIV EINDHOVEN TECH
公开号:WO2019177458A1
公开(公告)日:2019-09-19
The invention relates to a demethoxylation process for demethoxylating alkylmethoxyphenols using an aromatic solvent to produce alkylphenols. The invention also relates to dealkylation process for dealkylating alkylphenols using an aromatic solvent to produce phenol. The invention further relates to a tandem demethoxylation and dealkylation process, which can be performed in a single reactor. The process is useful in the conversion of lignin derived alkylmethoxyphenols into biophenol.
Intramolecularcyclization of phenol derivatives with CC doublebond on a side chain was examined using copper and silver catalyst. For example, 2-allylphenol (1a) was converted to 2,3-dihydro-2-methylbenzofuran (2a) in 70% yield using Cu(OTf)2 or in 90% yield using AgClO4. This catalysis was applied to cyclization of 2-allylphenol derivatives, 2-(3-butenyl)phenol, benzoic acids with CC double bond