Results 31 to 40 of about 69,375 (242)

Progress on Aroma Components and Synthetic Regulation Mechanism of Horticultural Plants

open access: yesGuangdong nongye kexue, 2023
The aroma of horticultural plants is produced by volatile organic compounds (VOCs) in their cells, mainly composed of esters, alcohols, aldehydes, ketones, ethers, terpenoids, alkanes and other substances, which is an important quality index ...
Chu YE   +7 more
doaj   +1 more source

Determination of the chemical composition of tea by chromatographic methods: a review [PDF]

open access: yes, 2015
Despite the fact that mankind has been drinking tea for more than 5000 years, its chemical composition has been studied only in recent decades. These studies are primarily carried out using chromatographic methods.
Combet, Emilie   +3 more
core   +1 more source

(S)-4-Isopropyl-5,5-diphenyloxazolidin-2-one

open access: yesMolbank, 2018
(S)-4-Isopropyl-5,5-diphenyloxazolidin-2-one has been synthesized for the first time by the enantiospecific oxidative carbonylation of commercially available (S)-2-amino-3-methyl-1,1-diphenylbutan-1-ol.
Raffaella Mancuso   +5 more
doaj   +1 more source

Recognition and Sensing of Chiral Organic Molecules by Chiral Porphyrinoids: A Review

open access: yesChemosensors, 2021
Porphyrinoids are extremely attractive for their electronic, optical, and coordination properties as well as for their versatile substitution at meso/β-positions.
Gabriele Travagliante   +3 more
doaj   +1 more source

Asymmetric synthesis of 2-substituted oxetan-3-ones via metalated SAMP/RAMP hydrazones [PDF]

open access: yes, 2013
2-Substituted oxetan-3-ones can be prepared in good yields and enantioselectivities (up to 84% ee) by the metalation of the SAMP/RAMP hydrazones of oxetan-3-one, followed by reaction with a range of electrophiles that include alkyl, allyl, and benzyl ...
Beasley, Benjamin   +3 more
core   +1 more source

Synthesis of highly functionalized β-aminocyclopentanecarboxylate stereoisomers by reductive ring opening reaction of isoxazolines

open access: yesBeilstein Journal of Organic Chemistry, 2012
A rapid and simple procedure was devised for the synthesis of multifunctionalized cyclic β-amino esters and γ-amino alcohols via the 1,3-dipolar cycloaddition of nitrile oxides to β-aminocyclopentenecarboxylates.
Melinda Nonn   +3 more
doaj   +1 more source

Palladium-Catalyzed Oxidation of β-C(sp3)-H Bonds of Primary Alkylamines through a Rare Four-Membered Palladacycle Intermediate. [PDF]

open access: yes, 2020
Site-selective functionalizations of C-H bonds are often achieved with a directing group that leads to five- or six-membered metallacyclic intermediates. Analogous reactions that occur through four-membered metallacycles are rare. We report a challenging
Bunescu, Ala   +5 more
core   +1 more source

Self-immolative linkers in polymeric delivery systems [PDF]

open access: yes, 2011
There has been significant interest in the methodologies of controlled release for a diverse range of applications spanning drug delivery, biological and chemical sensors, and diagnostics.
Blencowe, Christopher A   +4 more
core   +1 more source

Comparing the Volatile and Soluble Profiles of Fermented and Integrated Chinese Bayberry Wine with HS-SPME GC–MS and UHPLC Q-TOF

open access: yesFoods, 2023
To evaluate the flavor characteristics of Chinese bayberry alcoholic beverages, fermented bayberry wine (FBW) and integrated bayberry wine (IBW) were investigated for their volatile and soluble profiles using HS-SPME GC–MS and UHPLC Q-TOF and were ...
Yingjie Miao   +5 more
doaj   +1 more source

Stereoselective Synthesis and Cytoselective Toxicity of Monoterpene-Fused 2-Imino-1,3-thiazines

open access: yesMolecules, 2014
Starting from pinane-, apopinane- and carane-based 1,3-amino alcohols obtained from monoterpene-based β-amino acids, a library of monoterpene-fused 2-imino-1,3-thiazines as main products and 2-thioxo-1,3-oxazines as side-products were prepared via two ...
Zsolt Szakonyi   +3 more
doaj   +1 more source

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