نتایج جستجو برای: multicomponent reaction mcrs

تعداد نتایج: 421477  

2013
Mohammad Piltan Loghman Moradi Golaleh Abasi Seyed Amir Zarei

The catalyst-free multicomponent reaction of 1,2-diaminobenzene, dialkyl acetylenedicarboxylates, and ethyl bromopyruvate forms pyrrolo[1,2-a]quinoxaline derivatives in good yields. Ethylenediamine also reacts under similar conditions to produce new pyrrolo[1,2-a]pyrazine derivatives.

Journal: :Organic & biomolecular chemistry 2013
Teng-fei Niu Mu Sun Mei-fang Lv Wen-bin Yi Chun Cai

An efficient chemoselective process for the synthesis of 14- and 15-membered triazole-containing macrocycle compounds has been developed through the combination of two multicomponent reactions and an intramolecular Sonogashira cross-coupling reaction.

Journal: :Chemical communications 2011
Christopher G Evans Umesh K Jinwal Leah N Makley Chad A Dickey Jason E Gestwicki

A series of dihydropyridines were identified that have an effect on the accumulation of tau, an important target in Alzheimer's disease. The dihydropyridine collection was expanded using the Hantzsch multicomponent reaction to develop preliminary structure-activity relationships.

Journal: :Organic & biomolecular chemistry 2010
Ritwik Burai Chinnasamy Ramesh Marvin Shorty Ramona Curpan Cristian Bologa Larry A Sklar Tudor Oprea Eric R Prossnitz Jeffrey B Arterburn

The GPR30 agonist probe G-1 and structural analogs were efficiently synthesized using multicomponent or stepwise Sc(III)-catalyzed aza-Diels-Alder cyclization. Optimization of solvent and reaction temperature provided enhanced endo-diastereoselectivity.

2011
Bruno Piqani Wei Zhang

Dihydropyrimidinones and dihydropyrimidinethiones generated from the Biginelli reactions of perfluorooctanesulfonyl-attached benzaldehydes are used as common intermediates for post-condensation modifications such as cycloaddition, Liebeskind-Srogl reaction and Suzuki coupling to form biaryl-substituted dihydropyrimidinone, dihydropyrimidine, and thiazolopyrimidine compounds. The high efficiency...

Journal: :Accounts of chemical research 2000
C O Kappe

In 1893, P. Biginelli reported the synthesis of functionalized 3, 4-dihydropyrimidin-2(1H)-ones (DHPMs) via three-component condensation reaction of an aromatic aldehyde, urea, and ethyl acetoacetate. In the past decade, this long-neglected multicomponent reaction has experienced a remarkable revival, mainly due to the interesting pharmacological properties associated with this dihydropyrimidin...

Journal: :The Journal of clinical investigation 1986
J D Veldhuis F Fraioli A D Rogol M L Dufau

The plasma metabolic clearance of biologically active luteinizing hormone (bioactive LH) was studied using the rat interstitial cell testosterone (RICT) bioassay in six hypogonadotropic men after single bolus injection of highly purified human LH and during continuous steady-state infusions of three graded doses of LH. The LH bolus disappearance curves provided estimates of metabolic clearance ...

2008
Nazish M. Salahuddin Karen M. O’Brien Vivian Boyd Cheri Ostroff

Title of Dissertation: CHALLENGES AND RESILIENCE IN THE LIVES OF MULTIRACIAL ADULTS: THE DEVELOPMENT AND VALIDATION OF A MEASURE Nazish M. Salahuddin, Doctor of Philosophy, 2008 Directed By: Associate Professor Karen M. O’Brien, Department of Psychology The purpose of the present study was to develop and validate the Multiracial Challenges and Resilience Scale (MCRS). The MCRS is a measure of t...

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