Results 41 to 50 of about 2,794,131 (212)

Lewis Acid‐Catalyzed Strain‐Enabled (3+3) Annulation of Bicyclo[1.1.0]Butanes With Indolylalcohols: Synthesis of Indole‐Fused Aza‐Bicyclo[3.1.1]Heptanes

open access: yesAdvanced Science, EarlyView.
Bicyclo[1.1.0]butanes undergo a Lewis acid‐catalyzed formal (3 + 3) annulation with indolyl alcohols to furnish indole‐fused aza‐bicyclo[3.1.1]heptanes. Strain‐release‐driven C‐C bond formation, followed by C‐N bond formation via ring expansion, enables the rapid assembly of rigid, sp3‐rich bicyclic architectures under mild reaction conditions ...
Mainak Dey   +4 more
wiley   +1 more source

Dan Hammett: ceramics (2) [PDF]

open access: yes, 2017
ARTIST: Dan Hammett (UD Professor) MATERIAL: ceramics DIMENSIONS: 9.5" x 9.5" x 30" COLLECTION: UDC CATALOG#: UDC.3002.4 LOCATION: CFH PROVENANCE: University of Dallas, 2017From http://www.danhammettceramics.com/: I have been ...
Hammett, Dan
core  

Binding Constants of Substituted Benzoic Acids with Bovine Serum Albumin

open access: yesPharmaceuticals, 2020
Experimental data on the affinity of various substances to albumin are essential for the development of empirical models to predict plasma binding of drug candidates. Binding of 24 substituted benzoic acid anions to bovine serum albumin was studied using
Diliara Khaibrakhmanova   +2 more
doaj   +1 more source

Correlation of N.M.R. chemical shifts of N-methyl protons of substituted dimethylanilines with Hammett substituent constants

open access: yes, 1966
The proton magnetic resonance chemical shifts of N-methyl protons in para-substituted NN-dimethylanilines have been correlated with the Hammett - value of the para substituent. The correlation yields - values of 1.57 0.09 and 0.85 0.09 for the para
LK Dyall, ID Rae
core   +1 more source

Pb NMR, and Hammett Correlations

open access: yes, 2015
The synthesis, structure, and spectroscopic details of a series of ß-diketiminato lead(II) alkyl complexes are described. The Hammett correlation between the 207Pb NMR chemical shifts and spara Hammett constant was examined computationally and found to ...
Martyn P. Coles   +9 more
core   +1 more source

Synthesis, IR and NMR spectral correlations in some symmetrical diimines

open access: yesBulletin of the Chemical Society of Ethiopia, 2014
A series of diimines have been synthesized by coupling of diamine with substituted benzaldehydes. The purities of these diimines were checked by their analytical and spectroscopic data. The spectral frequencies νCN (cm-1), NMR chemical shifts (δ, ppm) of
G. Thirunarayanan
doaj   +1 more source

Click‐to‐Release Reactivity of Quaternary Anilinium Tetrazines Enables Cascade Assembly of Multifunctional Biomolecular Scaffolds

open access: yesAngewandte Chemie International Edition, EarlyView.
Click chemistry has evolved from making covalent connections to also breaking bonds. Here, a cascade assembly is reported that combines these maneuvers to build multifunctional biomolecular scaffolds in a modular one‐pot reaction. The unifying azide release‐tetrazine hub clicks with a trans‐cyclooctene tag, rapidly liberates N,N‐dimethylaniline to ...
Markus Staudt   +9 more
wiley   +1 more source

Dan Hammett: ceramics (4) [PDF]

open access: yes, 1982
"The Olympia Award" was a limited edition of a 523 B.C. Greek Replica Amphora that was awarded to the 1982 USA Summer Olympic Gold Medalist.
Hammett, Dan
core  

Studying of physicochemical properties of newly synthesized uracil derivatives

open access: yesZaštita Materijala, 2015
Uracil derivatives are potentially biologically active compounds, so the investigation of their physical and chemical properties is very important for their further application.
Jadranka A. Tot   +1 more
doaj   +1 more source

Relationship between electrophilicity index, Hammett constant and nucleus-independent chemical shift [PDF]

open access: yes, 2005
Inter-relationships between the electrophilicity index (Ω), Hammett constant (óp @#@) and nucleusindependent chemical shift (NICS (1) - NICS value one ångstrom above the ring centre) have been investigated for a series of meta- and para-substituted ...
Parthasarathi, R.   +7 more
core   +1 more source

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