Results 81 to 90 of about 140,146 (333)

Harnessing Vinylogy with Radicals: Photoinduced γ‐Benzylation Reactions of 2‐Silyloxyfurans

Advanced Synthesis &Catalysis, EarlyView.
Two radical‐mediated benzylations of 2‐silyloxyfurans, promoted by visible light and suitable photoredox catalysts have been disclosed. A broad scope of γ‐benzyl butenolides was obtained in one step, some of which were used as strategic precursors to bio‐valuable chiral butanolides.
Enrico Marcantonio, Debora Guazzetti, Luca Aimi, Kelly Bugatti, Pedro Mena, Marco Giannetto, Simone Fortunati, Andrea Sartori, Lucia Battistini, Leonardo Andreoni, Marco Lombardo, Franca Zanardi, Claudio Curti   +12 more
wiley   +1 more source

Identification of Quorum-Sensing Molecules of N-Acyl-Homoserine Lactone in Gluconacetobacter Strains by Liquid Chromatography-Tandem Mass Spectrometry

Molecules, 2019
Many Gram-negative bacteria can regulate gene expression in a cell density-dependent manner via quorum-sensing systems using N-acyl-homoserine lactones (AHLs), which are typical quorum-sensing signaling molecules, and thus modulate physiological ...
Ling-Pu Liu, Long-Hui Huang, Xiao-Tong Ding, Lin Yan, Shi-Ru Jia, Yu-Jie Dai, Yan-Yan Xie, Cheng Zhong   +7 more
doaj   +1 more source

Microbiological transformation of a synthetic benzofurane type lactone [PDF]

Journal of the Serbian Chemical Society, 2000
The aim of this work was the investigation of the biotransformation ability of a synthetic benzofurane type g-lactone. This work was based on the microbiological reactions of Aspergillus niger, Saccharomyces cerevisiae, Bacillus mycoides ...
Sukdolak S., Solujić-Sukdolak S., Krstić Lj.   +2 more
doaj   +1 more source

Studies on lactone stabilities [PDF]

, 2021
The theories of Bucourt concerning the stabilities of mono-and polycyclic compounds have been critically exarnined and modified. Ring strain (as measured by heats of combustion in the literature) may be calculated with irnproved accuracy by the modified theory.
openaire   +1 more source

Melt block copolymerization of ε-caprolactone and L-lactide [PDF]

, 1997
AB block copolymers of ε-caprolactone and (L)-lactide could be prepared by ring-opening polymerization in the melt at 110°C using stannous octoate as a catalyst and ethanol as an initiator provided ε-caprolactone was polymerized first.
Dijkstra, Pieter J., Feijen, Jan, Hamhuis, Jennie, Veld, Peter J.A. in 't, Velner, Esther M., Witte, P. van de   +5 more
core   +1 more source

Conversion of the Mycotoxin Patulin to the Less Toxic Desoxypatulinic Acid by the Biocontrol Yeast Rhodosporidium kratochvilovae Strain LS11 [PDF]

, 2011
Se describe en este artículo el descubrimiento de la degradación de la micotoxina patulina por una levaduraThe infection of stored apples by the fungus Penicillium expansum causes the contamination of fruits and fruit-derived products with the mycotoxin
Alberto Ritieni, Anatoly P. Sobolev, Bourdiol D., Castoria R., Castoria R., Castoria R., Castoria R., Castoria R., Castoria R., Cole R. J., Cristina Pinedo-Rivilla, Dario V. De Felice, de Felice D. V., Ferrer E., Fliege R., Fliege R., Francesca Maffei, Harwig J., Ippolito A., Janisiewicz W. J., Karlovsky P., Lilly V. G., Lima G., Luisa Mannina, MacDonald S., Mahfoud R., Mannina L., Moake M. M., Moss M. O., Patterson M. K., Pfeiffer E., Raffaello Castoria, Rosa Durán-Patrón, Rosalia Ferracane, Sandra A. I. Wright, Scott P. M., Si-min Z., Stinson E. E., Suzuki T., Uliasz F., Wallen L. L.   +40 more
core   +2 more sources

Asymmetric Strategies for the Synthesis of Enantiopure α‐/β‐/γ‐Thio‐Carboxylic Acids Bearing a Stereocentre at CS Bond

Advanced Synthesis &Catalysis, EarlyView.
Enantioenriched α‐/β‐/γ‐thiocarboxylic acids featuring C–S chirality are valuable targets in organic synthesis. This review outlines recent progress in their asymmetric synthesis, including chiral pool approaches, metal‐ /organo‐catalysis, and emerging biocatalytic strategies. Enantiomerically pure α‐/β‐/γ‐thiocarboxylic acids bearing a stereocentre at
Jingyue Wu, Daniele Castagnolo
wiley   +1 more source

Preferred β-lactone synthesis can explain high rate of false-negative results in the detection of OXA-48-like carbapenemases

Scientific Reports, 2022
The resistance to carbapenems is usually mediated by enzymes hydrolyzing β-lactam ring. Recently, an alternative way of the modification of the antibiotic, a β-lactone formation by OXA-48-like enzymes, in some carbapenems was identified.
Vendula Studentova, Vendula Sudova, Ibrahim Bitar, Veronika Paskova, Jiri Moravec, Petr Pompach, Michael Volny, Petr Novak, Jaroslav Hrabak   +8 more
doaj   +1 more source

Implications of Rewiring Bacterial Quorum Sensing [PDF]

, 2008
Bacteria employ quorum sensing, a form of cell-cell communication, to sense changes in population density and regulate gene expression accordingly.
Arnold, Frances H., Haseltine, Eric L.
core   +4 more sources

Integrating Visible‐Light Photocatalysis and Enzymes for the Stereoselective Synthesis of Alcohols and Amines

Advanced Synthesis &Catalysis, EarlyView.
The integration between visible‐light photocatalysis and biocatalysis has the potential to greatly improve modern organic synthesis by combining the production of valuable synthetic intermediates under mild photochemical conditions with the high degree of stereoselectivity reached by enzymes. The review collects the recent efforts in the photoenzymatic
Stefano Parisotto, Cristina Prandi
wiley   +1 more source