The presidents of the chemical societies of France (SFC), Germany (GDCh), Japan (CSJ), the Netherlands (KNCV), the UK (RSC), and the USA (ACS) recently pledged on behalf of about 300,000 members to "work together to promote global sustainable development, demand responsible use of resources, and ensure that the next generation of scientists protects and maintains the well-being of Earth and its inhabitants." They deem this issue an urgent one, and that chemistry is absolutely essential to the development of solutions.
Cooperation is better: A (RuO2)0.038(Nb2O5)0.024(SiO2)0.938 bifunctional catalyst was prepared by a one-pot sol–gel route. The presence of both acid and hydrogenation functionalities leads to an active, selective and stable catalyst for the conversion of levulic acid into γ-valerolactone.
Luciana Minieri, Serena Esposito, Vincenzo Russo, Barbara Bonelli, Martino Di Serio, Brigida Silvestri, Alessandro Vergara, Antonio Aronne
ChemCatChem, March 24, 2017, https://doi.org/10.1002/cctc.201601547 Read article
A new approach: α,ω-Diols are promising targets for the upgrading of lignocellulosic biomass. An alternative to prior direct hydrogenolysis approaches is developed. This new pathway utilizes a highly active intermediate, 2-hydroxytetrahydropyran. The reaction proceeds through ring-opening tautomerization of the hemiacetal and subsequent hydrogenation. Techno-economic analyses demonstrate that the new pathway is economically preferred over the direct hydrogenolysis approaches.
Zachary J. Brentzel, Kevin J. Barnett, Kefeng Huang, Christos T. Maravelias, James A. Dumesic, George W. Huber
ChemSusChem, March 09, 2017, https://doi.org/10.1002/cssc.201700178 Read article
An elemental match! Carbon–nitrogen bonds are ubiquitous in organic chemistry. This review presents some recent advances in redox reactions that use elemental sulfur and molecular iodine as excellent reagents/catalysts to provide these important linkages.
Thanh Binh Nguyen
Asian J. Org. Chem., March 02, 2017, https://doi.org/10.1002/ajoc.201700011 Read article
Drop Anchors! Immobilization of flavin on mesoporous silica MCM-41 was shown to be an effective way to prepare a heterogeneous flavin photocatalyst. Its possible application was demonstrated in visible light [2+2] photocycloaddition which are advantageous when compared to analogous homogeneous procedure.
Jessica Špačková, Eva Svobodová, Tomáš Hartman, Ivan Stibor, Jitka Kopecká, Jana Cibulková, Josef Chudoba, Radek Cibulka
ChemCatChem, March 01, 2017, https://doi.org/10.1002/cctc.201601654 Read article
The decarboxylative alkylation of carboxylic acids can be efficiently promoted by visible light under air at room temperature by using 9-mesitylene-10-methylacridinium perchlorate ([Acr-Mes]ClO4) as photocatalyst. A range of readily available starting materials are well tolerated in this transition-metal-free protocol.
Nieves P. Ramirez, Jose C. Gonzalez-Gomez
Eur. J. Org. Chem., January 31, 2017, https://doi.org/10.1002/ejoc.201601478 Read article