Results 201 to 210 of about 319,390 (394)
On the Preparation of Nickel Porphyrins Bearing Two to Four Nitro Groups at β‐Positions
European Journal of Organic Chemistry, EarlyView.The preparation and unambiguous identification via NMR spectroscopy of all six β$\beta$,β‐dinitrometalloporphyrin isomers and three out of fourβ$\beta$,β,β‐trinitrometalloporphyrin isomers are described, along with attempts to prepare β,β,β,β‐tetranitrometalloporphyrins via both direct nitration and condensation of nitropyrroles.
Ameneh Tatar +8 more
wiley +1 more source
Fluorenyl Cations: Synthesis and Reactivity. [PDF]
ChemistryThis review covers the history of fluorenyl cations from Deno's first report in 1954 on the parent fluorenyl cation to the present. The parent cation and most derivatives have only been observed as a fleeting species by mass spectrometry, UV/Vis spectroscopy, IR spectroscopy, or NMR spectroscopy while recent developments led to isolable species ...
Vashisth K +5 more
europepmc +2 more sources
Selective histochemical localization of polysaccharides in tissue sections oxidized by acetic anhydride in dimethyl sulfoxide. [PDF]
, 1976 George I. Malinin
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Toward the Synthesis of 3,3‐Difluoro Deaminated Sialic Acid (C3DFKDN)
European Journal of Organic Chemistry, EarlyView.The synthesis of protected C3‐difluoro KDN (C3DFKDN), an unnatural derivative of the sialic acid member, KDN, and key building block for KDN‐based chemical probes, is reported. Its 12‐step synthetic route starts from commercially available methyl d‐mannopyranoside and key steps include a Reformatsky reaction with ethyl bromodifluoroacetate, alkylation ...
Lemeng Chao, Tom Wennekes
wiley +1 more source
Synthesis of Rare‐Bacterial Sugar Analogs: Thomosamine and Fluorinated Thomosamine
European Journal of Organic Chemistry, EarlyView.We present the synthesis of protected thomosamine (4‐amino‐4,6‐dideoxy‐d‐galactopyranose), 3‐deoxy‐3‐fluoro‐thomosamine, and 2,3‐dideoxy‐2,3‐difluoro‐thomosamine from levoglucosan (1,6‐anhydro‐β‐d‐glucopyranose). Bacterial carbohydrates that include unusual deoxy amino sugars represent interesting targets in drug discovery.
Sam Bahadori +2 more
wiley +1 more source
Microwave Mediated Acylation of Alcohols, Phenols and Thiophenols in Neat Acetic Anhydride. [PDF]
J Org ChemTroftgruben MHS +12 more
europepmc +1 more source
Expanding the Chemical Space of Sugar Frameworks by Quaternization of the Anomeric Carbon Atom
European Journal of Organic Chemistry, EarlyView.Novel C,C and C,N bifunctional fucosides are stereoselectively obtained starting from a common anomeric bromide intermediate. The developed methodology expands the chemical space at the anomeric position of fucose and supports future applications in glycomimetics design.
Sarah Mazzotta +5 more
wiley +1 more source
Effects on ribosomal activity and structure of modification with succinic, maleic and acetic anhydrides [PDF]
, 1978 JoséAntonio Pintor-Toro +2 more
openalex +1 more source