Abstract:
:A method for producing tri- and tetrasubstituted ureas from carbamoyl imidazolium salts is presented. Carbamoyl imidazolium salts are prepared from the reaction of N,N carbonyldiimidazole (CDI) with secondary amines, followed by alkylation with iodomethane. These stable salts can be stored for extended periods and are effective electrophilic carbamoylation reagents. Primary and secondary amines add to carbamoyl imidazolium salts at room temperature to give tri- and tetrasubstituted ureas in excellent yields. This reaction was used to synthesize ureas using both liquid-liquid extraction and solid-phase extraction (cation exchange) purification techniques. Liquid-liquid extraction affords the product ureas more cleanly than cationic exchange. A series of urea compounds were synthesized using parallel synthesis techniques in high yields and with suitable purity for routine in vitro biological tests. These studies validate the utility of carbamoyl imidazolium salts as useful building blocks for combinatorial library synthesis.
journal_name
Comb Chem High Throughput Screenjournal_title
Combinatorial chemistry & high throughput screeningauthors
Batey RA,Shen M,Santhakumar V,Yoshina-Ishii Cdoi
10.2174/1386207024607211subject
Has Abstractpub_date
2002-05-01 00:00:00pages
219-32issue
3eissn
1386-2073issn
1875-5402journal_volume
5pub_type
杂志文章abstract:AIM AND OBJECTIVE:The importance of Chromeno[4,3-b]pyridines in bioactive compounds, highlighted the ongoing research on developing novel methods for the construction of this heterocyclic scaffold. Regarding the advantageous features of multi-component reactions in organic synthesis, we will try to synthesize pyridocou...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章
doi:10.2174/1386207321666180524110635
更新日期:2018-01-01 00:00:00
abstract::For years, the physicochemical properties of drug candidates have been used to predict their in vivo pharmacokinetic behaviors. Several theories and empirical correlations have been established by various researchers with the overall goal of expediting the drug candidate selection process, with greater confidence and ...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章
doi:10.2174/138620709787581693
更新日期:2009-03-01 00:00:00
abstract::Mass spectrometric plasma analysis for biomarker discovery has become an exploratory focus in proteomic research: the challenges of analyzing plasma samples by mass spectrometry have become apparent not only since the human proteome organization (HUPO) has put much emphasis on the human plasma proteome. This work demo...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章
doi:10.2174/138620705774962427
更新日期:2005-12-01 00:00:00
abstract:AIM AND OBJECTIVE:Thiazol-2-imine derivatives are interested for their pharmaceutical and biologic activities. A literature survey reveals that there have been no any reports on the synthesis of thiazol-2-imine derivatives without substituents in position C-4 and C-5 via one-pot reaction. Herein we report an efficient ...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章
doi:10.2174/1568009617666161107093942
更新日期:2017-01-01 00:00:00
abstract::Screening of phage display libraries allows rapid identification of peptides binding to a target. However, functional analysis of the phage sequences and their reproduction as soluble and stable peptides are often the most time-consuming part in the screening. We have used here intein-based peptide biosynthesis to pro...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章
doi:10.2174/1386207033329869
更新日期:2003-02-01 00:00:00
abstract::A pulsed ultrafiltration-mass spectrometric screening assay has been developed to generate and identify electrophilic metabolites of xenobiotic compounds formed by hepatic cytochrome P450 enzymes. This assay would be suitable for the early identification of potentially toxic compounds during the initial phase of drug ...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章
doi:
更新日期:1999-06-01 00:00:00
abstract:AIM AND OBJECTIVE:MMP-13 belongs to a large family of proteases called matrix metalloproteinases (MMPs) that degrades type II collagen, the main structural protein of articular cartilage. The main pathologic role of MMP-13 over expression is to contribute to the development of osteoarthritis. METHODS:To find new inhib...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章
doi:10.2174/1386207320666170816141351
更新日期:2017-01-01 00:00:00
abstract:AIM AND OBJECTIVE:In this work, we synthesized and characterized a novel Brönsted acidic ionic liquid from the reaction of N, N, N', N'-tetramethylethylenediamine with chlorosulfonic acid and explored its catalytic activity in 1, 8-dioxo-octahydroxanthenes synthesis. MATERIALS AND METHODS:Dimedone, aryl aldehydes, and...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章
doi:10.2174/1386207321666180828092546
更新日期:2018-01-01 00:00:00
abstract::The section on patent review will be focused in the areas of interest to the readers of CCHTS. The search was conducted using the following key words: combinatorial chemistry, high throughput screening, drug repurposing, chemical library, high content screening, drug discovery and natural products. All patents highlig...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章,评审
doi:10.2174/138620711795222473
更新日期:2011-05-01 00:00:00
abstract:AIM:It has been reported that glial cells are involved in Alzheimer's disease (AD). According to our previous research, Scutellaria barbata flavonoids (SBFs) can protect the neuronal disorder and memory impairment for AD-like rats, while the effect of SBFs on the glial cells disorder in AD-like rats has been less well ...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章
doi:10.2174/1386207323666201209092358
更新日期:2020-12-08 00:00:00
abstract::A biomimetic sensor is proposed as a promising new analytical method for determination of captopril in different classes of samples. The sensor was prepared by modifying a carbon paste electrode with iron (II) phthalocyanine bis(pyridine) [FePc(dipy)] complex. Amperometric measurements in a batch analytical mode were ...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章
doi:10.2174/138620710791920392
更新日期:2010-09-01 00:00:00
abstract::The recent success of the human genome project and the continued accomplishment in obtaining DNA sequences for a vast array of organisms is providing an unprecedented wealth of information. Nevertheless, an abundance of the proteome contains hypothetical proteins or proteins of unknown function, where high throughput ...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章,评审
doi:10.2174/138620707782507331
更新日期:2007-09-01 00:00:00
abstract::In this paper, we introduce two nonconventional ionic liquid compounds which are composed of propane sulfonate functionalized organic cations and heteropolyanions as green solid acid catalysts for the highly efficient and green synthesis of 2,3-disubstitutedquinoxaline derivatives. These ionic liquids are in the solid...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章
doi:10.2174/1386207311316080004
更新日期:2013-09-01 00:00:00
abstract:BACKGROUND AND OBJECTIVE:Perimenopause is a physiological occurrence in women, and is characterized by endocrine and biochemical changes. During perimenopause phase, many derangements or abnormal health conditions start developing as a result of hormonal changes. These derangements in health conditions and biochemical ...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章
doi:10.2174/1386207323666201023120212
更新日期:2020-10-23 00:00:00
abstract::Whole Cell-matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry (MALDI-TOF-MS) is an emerging sensitive technique for rapid typing of microorganisms, efficient screening of biocombinatorial libraries of natural compounds and the analysis of complex biological samples, as whole cells, subcellula...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章,评审
doi:10.2174/138620703106298725
更新日期:2003-09-01 00:00:00
abstract::Widely diverse biological queries are now routinely analyzed on the various optical platforms: laser line scanners, nonconfocal imagers and confocal imagers. These analyses may be performed to query a limited number of samples or range to include the evaluation of a million samples as is the goal of many screening dep...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章,评审
doi:10.2174/138620709789383231
更新日期:2009-11-01 00:00:00
abstract:AIM AND OBJECTIVE:4-Hydroxyphenylpyruvate dioxygenase (HPPD), converting phydroxyphenylpyruvate (HPPA) to homogentisate (HGA), is an important target for treating type I tyrosinemia and synthesizing novel herbicides due to its significant role in tyrosine catabolism. Hence, it is imperative to design novel HPPD inhibit...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章
doi:10.2174/1386207320666170622073738
更新日期:2017-01-01 00:00:00
abstract::The National Institute of Mental Health (NIMH) Psychoactive Drug Screening Program (PDSP) is a resource that provides free screening of novel compounds to academic investigators. This program differs from other public-sector screening programs in that compounds are screened against a large panel of transmembrane recep...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章,评审
doi:10.2174/138620708784911483
更新日期:2008-07-01 00:00:00
abstract:AIM AND OBJECTIVE:The rapid increase in the amount of protein sequence data available leads to an urgent need for novel computational algorithms to analyze and compare these sequences. This study is undertaken to develop an efficient computational approach for timely encoding protein sequences and extracting the hidden...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章
doi:10.2174/1386207321666180130100838
更新日期:2018-01-01 00:00:00
abstract:BACKGROUND:The fruit pulp decoction of Crescentia cujete, commonly known as calabash, is traditionally used for the treatment of several respiratory diseases and is available as syrup formulations. Unfortunately, there is no detailed investigation on analytical methods for warranting the quality of these products. AIM...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章
doi:10.2174/1386207323666201207114302
更新日期:2020-12-06 00:00:00
abstract::Historically, most bioanalytical methods for drug analysis in pharmaceutical industry were developed using HPLC coupled with UV or fluorescence detection. However, there is a trend toward interfacing separation technologies with more sensitive tandem mass spectrometry (MS/MS)-based systems. MS/MS detection offers comp...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章,评审
doi:10.2174/138620706775213895
更新日期:2006-01-01 00:00:00
abstract::The high level of attrition of drugs in clinical development has led pharmaceutical companies to increase the efficiency of their lead identification and development through techniques such as combinatorial chemistry and high-throughput (HTP) screening. Since the major reasons for clinical drug candidate failure other...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章,评审
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更新日期:2005-02-01 00:00:00
abstract::Phage display is a biological system which facilitates the cloning and rapid selection of peptides from large combinatorial libraries. In compa-rison to the chemical combinatorial approach, the advantages of phage display lie in its simplicity and replicability. While phage display has many diverse applications, this ...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章,评审
doi:
更新日期:1999-08-01 00:00:00
abstract:AIM AND OBJECTIVE:Actinomycetes produce structurally unique secondary metabolites with pharmaceutically essential bioactivities. Salinispora, an obligate marine actinomycete, produces structurally varied and unique secondary metabolites. There is plenty of scope for development of drugs from the novel compounds isolate...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章
doi:10.2174/1386207319666161215154128
更新日期:2017-01-01 00:00:00
abstract::High performance liquid chromatography (HPLC), electrospray ionization mass spectrometry (ESI) and high performance liquid chromatography coupled to mass spectrometry (LC-MS) were used to analyze randomly chosen samples from parallel syntheses carried out on derivatized polypropylene crowns compatible with a Multipin ...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章
doi:
更新日期:1999-10-01 00:00:00
abstract::Sequential injection analysis (SIA) has been employed as the platform for the development of a high throughput automated assay for glutathione (GSH) in nutrition supplements. The proposed assay is based on the on-line formation of a UV-absorbing thioacrylate derivative (lambda(max) = 285 nm) upon reaction of thiol wit...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章
doi:10.2174/138620710791515923
更新日期:2010-07-01 00:00:00
abstract::Two approaches were utilized to increase the throughput of pulsed ultrafiltration assays of ligand binding to human serum albumin, reducing the volume of the ultrafiltration chamber and combining pulsed ultrafiltration with high performance liquid chromatography-atmospheric pressure chemical ionization mass spectromet...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章
doi:
更新日期:1999-12-01 00:00:00
abstract::Bacteriophage (phage) display has been exploited for the purpose of discovering new cancer specific targeting peptides. However, this approach has resulted in only a small number of tumor targeting peptides useful as in vivo imaging agents. We hypothesize that in vivo screening for tumor uptake of fluorescently tagged...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章
doi:10.2174/1386207311107010009
更新日期:2011-01-01 00:00:00
abstract::High Throughput experimentation has been well established as a tool in early stage catalyst development and catalyst and process scale-up today. One of the more challenging areas of catalytic research is polymer catalysis. The main difference with most non-polymer catalytic conversions is the fact that the product is ...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章
doi:10.2174/138620712798868374
更新日期:2012-02-01 00:00:00
abstract::A new, efficient, and solvent-free cyclocondensation reaction of arylmethylidenepyruvic acids with 6- aminouracils is presented that uses a catalytic amount of ZnO nanoparticles (ZnO Nps) as a recyclable catalyst at 70 °C. This protocol has the advantages of high yields (91-98%), easy work-up, very short reaction time...
journal_title:Combinatorial chemistry & high throughput screening
pub_type: 杂志文章
doi:10.2174/1386207311316010005
更新日期:2013-01-01 00:00:00