نتایج جستجو برای: trisubstituted imidazoles

تعداد نتایج: 4534  

Journal: :Antimicrobial agents and chemotherapy 1981
I J Sud D S Feingold

The three imidazole antimycotics clotrimazole, miconazole, and ketoconazole all inhibit the demethylation of lanosterol to ergosterol, resulting in inhibition of growth of Saccharomyces cerevisiae; this is a fungistatic action. At higher concentrations clotrimazole and miconazole are fungicidal, whereas ketoconazole is not. The fungicidal action reflects direct membrane damage by the imidazoles...

Journal: :Organic & biomolecular chemistry 2012
Michael A Schmidt Martin D Eastgate

A short and efficient synthesis of 1,4-disubstituted imidazoles has been developed which provides the desired products with complete regioselectivity. This protocol allows preparation of compounds which are challenging to prepare by current literature methods in a regioselective fashion, a sterically and electronically diverse range of N-substituents being accessible. The sequence involves an u...

Journal: :Journal of Biological Chemistry 1925

Journal: :Chemical communications 2009
Patrick Loos Matthias Riedrich Hans-Dieter Arndt

2-Imidazolines and imidazoles have been accessed by an aza-Wittig sequence featuring novel N-acylation methodology for sulfonamides and optimized conditions for ring closure.

Journal: :Chemical communications 2011
Juventino J García Paulina Zerecero-Silva Grisell Reyes-Rios Marco G Crestani Alma Arévalo Rigoberto Barrios-Francisco

Nickel(0) catalysts were used to produce substituted imidazoles in good to high yields using benzonitrile, p-substituted benzonitriles and 4-cyanopyridine as starting materials.

Journal: :Chemical communications 2013
Partha Sarathi Addy Baisakhee Saha N D Pradeep Singh Amit K Das Jacob T Bush Clarisse Lejeune Christopher J Schofield Amit Basak

The synthesis of small molecule based 1,3,5-trisubstituted benzenes for photo-mediated capture of human carbonic anhydrase II with visualisation by fluorescence is described.

Journal: :Chemical communications 2008
Yoshihiko Yamamoto Naohiro Kirai Yu Harada

The CuOAc-catalyzed reaction of internal alkynoates with arylboronic acids proceeded under mild conditions to yield trisubstituted cinnamates stereoselectively.

Journal: :Chemical & Pharmaceutical Bulletin 2021

The synthesis of 2,2-dimethyloxepane frameworks based on the 7-endo-trig cyclization ene-diol using a catalytic amount metal catalysts (Au, Ag) or Bronsted acid (TfOH) has been developed. Also, spiro-type dioxabicyclic products were also derived from diene-diols. For condition catalysts, selectively reacted between 1,1,3-trisubstituted alkenes and alcohols to form frameworks. On other hand, TfO...

Journal: :Journal of the American Chemical Society 2004
Kimberly N Cossey Raymond L Funk

Enecarbamates are shown to be excellent terminating groups for Prins cyclizations. A noteworthy feature of this methodology is the easy, stereoselective construction of the cyclization precursors by alkylation of metalated (E)-enecarbamates with epoxides. The stereochemistry of the resultant trisubstituted (E)-enecarbamates is then transferred with high fidelity to afford the frequently observe...

Journal: :Chemical science 2017
Nicholas J Race Adele Faulkner Gabriele Fumagalli Takayuki Yamauchi James S Scott Marie Rydén-Landergren Hazel A Sparkes John F Bower

The first examples of highly enantioselective Narasaka-Heck cyclizations are described. A SPINOL-derived P,N-ligand system enables Pd-catalyzed 5-exo cyclization of a range of oxime esters with sterically diverse trisubstituted alkenes to generate dihydropyrroles containing tetrasubstituted nitrogen-bearing stereocenters in 56 to 86% yield and 90 : 10 to 95 : 5 e.r. These processes are rare exa...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید