Results 61 to 70 of about 35,698 (262)

Mono-\u3cem\u3eN\u3c/em\u3e-acyl-2,6-diaminopimelic Acid Derivatives: Analysis by Electromigration and Spectroscopic Methods and Examination of Enzyme Inhibitory Activity [PDF]

open access: yes, 2014
Thirteen mono-N-acyl derivatives of 2,6-diaminopimelic acid (DAP)—new potential inhibitors of the dapE-encoded N-succinyl-l,l-diaminopimelic acid desuccinylase (DapE; EC 3.5.1.18)—were analyzed and characterized by infrared (IR) and nuclear magnetic ...
Buděšínský, Miloš   +10 more
core   +1 more source

Reactivity of (3-Methylpentadienyl)iron(1+) Cation: Late-stage Introduction of a (3-Methyl-2Z,4-pentadien-1-yl) Side Chain [PDF]

open access: yes, 2016
The 3-methyl-2Z,4-pentadien-1-yl sidechain is found in various sesquiterpenes and diterpenes. A route for the late stage introduction of this functionality was developed which relies on nucleophilic attack on the (3-methylpentadienyl)iron(1+) cation ...
Chaudhury, Subhabrata   +2 more
core   +3 more sources

Diastereomer characterizations of nitroxide-labeled nucleic acids [PDF]

open access: yesBiochemical and Biophysical Research Communications, 2008
Site-directed spin labeling (SDSL) obtains structural and dynamic information of a macromolecule using a site-specifically attached stable nitroxide radical. SDSL studies of arbitrary DNA and RNA sequences can be achieved using an efficient phosphorothioate labeling scheme, where a nitroxide is attached to a phosphorothioate substituted at a target ...
Gian Paola G, Grant   +2 more
openaire   +2 more sources

Research Progress on the Selectivity and Biomagnification of Chiral Hexabromocyclododecanes Pollutants in Food Chain Transfer

open access: yesYankuang ceshi, 2016
Hexabromocyclododecanes (HBCDs) are globally produced brominated flame retardant (BFR) and are used primarily as an additive FR in thermal insulation building materials, upholstery textiles, and electronics.
TIAN Qin   +5 more
doaj   +1 more source

Syntheses of (+)-30-epi-, (-)-6-epi-, (±)-6,30-epi-13,14-didehydroxyisogarcinol and (±)-6,30-epi-garcimultiflorone A utilizing highly diastereoselective, Lewis acid-controlled cyclizations [PDF]

open access: yes, 2016
The first syntheses of 13,14-didehydroxyisogarcinol (6) and garcimultiflorone A (5) stereoisomers are reported in six steps from a commercially available phloroglucinol.
Boyce, Jonathan H.   +2 more
core   +1 more source

Simultaneous cyclization and derivatization of peptides using cyclopentenediones [PDF]

open access: yes, 2017
Unprotected linear peptides containing N-terminal cysteines and another cysteine residue can be simultaneously cyclized and derivatized using 2,2-disubstituted cyclopentenediones. High yields of cyclic peptide conjugates may be obtained in short reaction
Agramunt, Jordi   +4 more
core   +2 more sources

Synthesis of Novel Planar-Chiral Charge-Compensated nido-Carborane-Based Amino Acid

open access: yesMolecules
Amino acids with unusual types of chirality and their derivatives have recently attracted attention as precursors in the synthesis of chiral catalysts and peptide analogues with unique properties.
Dmitry A. Gruzdev   +5 more
doaj   +1 more source

Double Intramolecular Transacetalization of Polyhydroxy Acetals: Synthesis of Conformationally-Restricted 1,3-Dioxanes with Axially-Oriented Phenyl Moiety

open access: yesMolecules, 2016
The synthesis of conformationally-restricted 1,3-dioxanes with a phenyl moiety fixed in an axial orientation at the acetalic center is described. Starting with diethyl 3-hydroxyglutarate (15), benzaldehyde acetal 12a and acetophenone ketal 12b bearing a ...
Samuel Asare-Nkansah, Bernhard Wünsch
doaj   +1 more source

Separation of folinic acid diastereomers in capillary electrophoresis using a new cationic β-cyclodextrin derivative. [PDF]

open access: yesPLoS ONE, 2015
A method for the separation of folinic acid diastereomers by capillary electrophoresis in chiral separation media was developed. Aiming to achieve a good separation of the anionic analytes, a newly synthesized cationic β-cyclodextrin derivative, mono-6 ...
Jia Yu   +5 more
doaj   +1 more source

Isolation and identification of a male-produced aggregation-sex pheromone for the velvet longhorned beetle, Trichoferus campestris. [PDF]

open access: yes, 2019
The velvet longhorned beetle, Trichoferus campestris (Faldermann) ("VLB"; Coleoptera: Cerambycidae), is native to eastern Asia where it infests and damages a wide range of deciduous and coniferous tree species, including orchard and timber species ...
Crook, Damon J   +5 more
core   +2 more sources

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