Paraphenylene dimers with diphenylamine donor groups: synthesis and photophysics
摘要:
A novel paraphenylene dimer (D696) with electron donating diphenylamine side chain groups has been prepared. Optical absorption measurements were theoretically and experimentally determined showing a red shift in the absortivity relative to dialkylamine functionalized benzophenone dimers. The fluorescence of D696 was quenched in a concentration dependent manner in the presence of reduced graphene oxide (RGO). (C) 2013 Elsevier Ltd. All rights reserved.
Sodium Butylated Hydroxytoluene: A Functional Group Tolerant, Eco‐Friendly Base for Solvent‐Free, Pd‐Catalysed Amination
作者:Volodymyr Semeniuchenko、Wilfried M. Braje、Michael G. Organ
DOI:10.1002/chem.202101617
日期:2021.9
NaBHT (sodium 2,6-di-tert-butyl-4-methylphenolate), a strong, but hindered and lipophilic base, has been effectively paired with similarly lipophilic, high-reactivity Pd-NHC (N-heterocyclic carbene) catalysts to produce an ideal combination for performing solvent-free (melt) cross-coupling amination. The mild nucleophilicity of NaBHT, coupled with the anti-oxidant properties of its conjugate acid byproduct
[EN] DIPHENYLAMINO-METHYLENE MALONONITRILE BASED COMPOUNDS AS FLUORESCENCE PROBES<br/>[FR] COMPOSÉS À BASE DE DIPHÉNYLAMINO-MÉTHYLÈNE MALONONITRILE EN TANT QUE SONDES DE FLUORESCENCE
申请人:UNIV OF HYDERABAD
公开号:WO2020044213A1
公开(公告)日:2020-03-05
The present invention provides compounds of formula (I) and formula (II): or a pharmaceutically acceptable salt or a stereoisomer thereof; wherein, ring A and ring B have the meanings given in the specification. The compounds of the present disclosure are useful as fluorescence probe in detecting tubulin in a sample and therefore useful for the diagnosis of tubulin and its associated diseases like cancer in a subject.
Development of an S<sub>N</sub>Ar Reaction: A Practical and Scalable Strategy To Sequester and Remove HF
作者:A. John Blacker、Gabriel Moran-Malagon、Lyn Powell、William Reynolds、Rebecca Stones、Michael R. Chapman
DOI:10.1021/acs.oprd.8b00090
日期:2018.9.21
simple and operationally practical method to sequester and remove fluoride generated through the SNAr reaction between amines and aryl fluorides is reported. Calcium propionate acts as an inexpensive and environmentally benign in situ scrubber of the hydrofluoricacid byproduct, which is simply precipitated and filtered from the reaction mixture during standard aqueous workup. The method has been tested
报道了一种简单且操作上可行的方法,用于隔离和去除通过胺与芳基氟化物之间的S N Ar反应生成的氟化物。丙酸钙可作为氢氟酸副产物的廉价且对环境无害的原地洗涤器,在标准的水后处理过程中,氢氟酸副产物可以简单地从反应混合物中沉淀出来并过滤掉。该方法已在10到100 g的操作规模上进行了测试,显示在每种情况下氟化物含量均降低> 99.5%。两种规模的氟化钙都得到了全面的回收,这证明这是一种通用,有效且健壮的氟化物提取方法,有助于防止搪玻璃反应堆腐蚀。
Evaluation of Aromatic Amination Catalyzed by Palladium on Carbon: A Practical Synthesis of Triarylamines
heterogeneous palladium on carbon (Pd/C)-catalyzed coupling between amines and aromatic halides including aromatic chlorides has been achieved using sodium tert-butoxide (NaO-t-Bu) and 1,1′-bis(diphenylphosphino)ferrocene (dppf) as a ligand in cyclopentyl methyl ether (CPME). The use of potassium tert-butoxide (KO-t-Bu) in place of NaO-t-Bu brought about the benzyne-mediated aromaticamination even without
Polymorphism and mechanochromic luminescence of a highly solid-emissive quinoline-β-ketone boron difluoride dye
作者:Ronghua Tan、Qifei Lin、Ying Wen、Shuzhang Xiao、Sa Wang、Ronghua Zhang、Tao Yi
DOI:10.1039/c5ce01138h
日期:——
A highly solid-emissive borondifluoridedye exhibiting polymorphism-dependent and mechanochromicluminescence has been synthesized. Three single-crystal X-ray structures of the polymorphic dye molecule, having different fluorescence emissions, are elucidated. Each polymorph displays different stacking orientations among their chromophore moieties and several different intermolecular interactions,