Results 11 to 20 of about 217,585 (392)

Microbial Reduction of Ketopantoyl Lactone to Pantoyl Lactone [PDF]

open access: yesApplied Microbiology, 1974
The results of a microbial survey study have shown that the ability to reduce added ketopantoic acid (or ketopantoyl lactone) and accumulate pantoic acid (or pantoyl lactone) in the growth medium is widespread among diverse fungi. The reductions generally proceeded with less than full stereoselectivity.
R P, Lanzilotta   +2 more
openaire   +2 more sources

Visible-light-induced addition of carboxymethanide to styrene from monochloroacetic acid

open access: yesBeilstein Journal of Organic Chemistry, 2020
Where monochloroacetic acid is widely used as a starting material for the synthesis of relevant groups of compounds, many of these synthetic procedures are based on nucleophilic substitution of the carbon chlorine bond.
Kaj M. van Vliet   +3 more
doaj   +1 more source

Nine New and Five Known Polyketides Derived from a Deep Sea-Sourced Aspergillus sp. 16-02-1

open access: yesMarine Drugs, 2014
Nine new C9 polyketides, named aspiketolactonol (1), aspilactonols A–F (2–7), aspyronol (9) and epiaspinonediol (11), were isolated together with five known polyketides, (S)-2-(2′-hydroxyethyl)-4-methyl-γ-butyrolactone (8), dihydroaspyrone (10 ...
Xiu-Wen Chen   +5 more
doaj   +1 more source

Diastereo- and Atroposelective Synthesis of Bridged Biaryls Bearing an Eight-Membered Lactone through an Organocatalytic Cascade.

open access: yesJournal of the American Chemical Society, 2019
We present herein an unprecedented stereoselective synthesis of bridged biaryls with defined axial and central chirality from readily available starting materials.
Shenci Lu   +7 more
semanticscholar   +1 more source

Synthesis and analysis of stable isotope-labelled N-acyl homoserine lactones [PDF]

open access: yes, 2016
Aliphatic aldehydes were deuterated at the alpha-position via a base-catalyzed exchange reaction with D2O. These deuterated building blocks were used for the synthesis of labelled analogues of quorum sensing signal molecules belonging to the three major ...
De Kimpe, Norbert   +3 more
core   +2 more sources

Research Progress on the Sources and Preparation Methods of Chiral Lactones [PDF]

open access: yesShipin Kexue, 2023
γ- and δ-lactones are important flavor compounds, which are widely used in foods and daily chemical flavors. Due to the chiral centers in the molecules, the aroma characteristics of the two enantiomers of each of the lactones are quite different, which ...
WANG Wei, WANG Jingyu, XIN Xuan, REN Wenbin, BAI Weidong, MAO Yue
doaj   +1 more source

Biocatalytic Synthesis of Stereospecific Triketide Lactones using Polyketide Synthases [PDF]

open access: yes, 2016
Polyketide synthases are modular enzymes that create and modify large acyl chains. The domains and modules of polyketide synthases allow us to create molecules that resemble naturally occurring products by applying a biocatalytic in vitro in vivo ...
Alexander, Bradley
core   +1 more source

The RhlR quorum-sensing receptor controls Pseudomonas aeruginosa pathogenesis and biofilm development independently of its canonical homoserine lactone autoinducer

open access: yesPLoS Pathogens, 2017
Quorum sensing (QS) is a bacterial cell-to-cell communication process that relies on the production, release, and response to extracellular signaling molecules called autoinducers.
Sampriti Mukherjee   +4 more
semanticscholar   +1 more source

6-Deoxyhexoses froml-Rhamnose in the Search for Inducers of the Rhamnose Operon: Synergy of Chemistry and Biotechnology [PDF]

open access: yes, 2016
In the search for alternative non‐metabolizable inducers in the l ‐rhamnose promoter system, the synthesis of fifteen 6‐deoxyhexoses from l ‐rhamnose demonstrates the value of synergy between biotechnology and chemistry.
Estévez, Amalia   +12 more
core   +3 more sources

Enhanced Reactivity of Aluminum Complexes Containing P-Bridged Biphenolate Ligands in Ring-Opening Polymerization Catalysis

open access: yesFrontiers in Chemistry, 2018
Aluminum complexes containing [RP(O)(2-O-3,5-tBu2C6H2)2]2− [R = tBu (3a), Ph (3b)] have been synthesized, structurally characterized, and their reactivity studied in comparison with those of their [RP(2-O-3,5-tBu2C6H2)2]2− [R = tBu (2a), Ph (2b)] analogs.
Xue-Ru Zou   +4 more
doaj   +1 more source

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