نتایج جستجو برای: multicomponent reaction

تعداد نتایج: 421340  

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: :Bioresource technology 2011
Nguyen Ngoc Tuan Hsiao-Cheng Hsieh Yi-Wen Lin Shir-Ly Huang

Eighteen 4-t-octylphenol-degrading bacteria were isolated and screened for the presence of degradative genes by polymerase chain reaction method using four designed primer sets. The primer sets were designed to amplify specific fragments from multicomponent phenol hydroxylase, single component monooxygenase, catechol 1,2-dioxygenase and catechol 2,3-dioxygenase genes. Seventeen of the 18 isolat...

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