Results 121 to 130 of about 31,212,444 (222)
Angewandte Chemie, EarlyView.A biobased tricyclic thionolactone undergoes selective isomerization ring‐opening polymerization to yield a high‐molecular‐weight polythioester with an exceptionally high Tg of 171°C, exceeding that of the analogous polyester. The polythioester efficiently depolymerizes through backbiting, while its hydrolysis and methanolysis reveal the critical ...
Eva Harsevoort +4 more
wiley +2 more sources
Flavin Catalysts in Organic Synthesis
Angewandte Chemie, EarlyView.Flavins and their congeners are potent catalysts for organic synthesis inspired by enzymatic transformations. In addition to catalysis in the flavin ground state via covalent intermediates, the excited singlet and triplet states unlock applications including photooxidation, photoreduction, and energy transfer via sensitization.
Jan Freudenberg, Golo Storch
wiley +2 more sources
How electric bikes reduce car use:A dual-mode ownership perspective [PDF]
Electric bikes (e-bikes) can play a vital role in sustainable transportation and reducing car dependence. However, questions persist regarding the extent to which e-bikes contribute to replacing and complementing car use and other modes, especially from ...
Liu, Xiang +4 more
core +1 more source
NHC‐Copper(I)‐Mediated Functionalization of White Phosphorus
Angewandte Chemie, EarlyView.White phosphorus is functionalized by N‐heterocyclic carbene supported copper(I) complexes through redox‐neutral steps. Treatment of the resulting complexes with electrophiles releases the ligands from the metal center as asymmetrically substituted organophosphorus butterfly compounds.
Thomas M. Horsley Downie +4 more
wiley +2 more sources
As a form of active travel, shared bike use has been challenged by climate change, particularly by the increasing frequency and intensity of extreme temperatures.
Liang, Yuan +3 more
core +1 more source
Cobalt‐Catalyzed [2σ+2π] Cycloaddition via Site‐Selective Capture of Bicyclobutane Diradical
Angewandte Chemie, EarlyView.We report a Co(II)‐catalyzed strategy that combines thermal activation of bicyclo[1.1.0]butane (BCBs) with site‐selective radical capture to furnish head‐to‐head fused bicyclo[2.1.1]hexanes via [2σ+2π] cycloaddition with indoles. Detailed mechanistic studies (31P NMR, EPR, CV, and DFT) support the catalytic pathway, while phosphine‐oxide trapping and X‐
Tanmayee Nanda +8 more
wiley +2 more sources
A push for public health: the effect of e-bikes on physical activity levels. [PDF]
BMC Public Health, 2017 Sundfør HB, Fyhri A.
europepmc +1 more source
Rise of E-bikes and the need to prevent injuries through investments in infrastructure. [PDF]
Trauma Surg Acute Care OpenFrattaroli S, Ni N, Douglas C.
europepmc +1 more source
Angewandte Chemie International Edition, EarlyView.We introduce the Aza‐Büchner–Curtius–Schlotterbeck (ABCS) reaction: A mild, catalyst‐free method for homologating aryl imines. Diverging from the traditional BCS mechanism, the diazo intermediate undergoes selective C─C insertion to form an all‐carbon quaternary center.
Simon O. Angerer +6 more
wiley +1 more source