ORGANIC CHEMISTRY INTERNATIONAL............
BY DR ANTHONY MELVIN CRASTO, Helping millions with websites, millions of hits on google. 30 yrs exp in the field of Process development
DR ANTHONY MELVIN CRASTO Ph.D ( ICT, Mumbai) , INDIA 30 Yrs Exp. in the feld of Organic Chemistry. Serving chemists around the world. Helping them with websites on Chemistry.Millions of hits on google, world acclamation from industry, academia, drug authorities for websites, blogs and educational contributionn
Catal. Sci. Technol., 2017, Advance Article DOI: 10.1039/C7CY01621B, Paper
Youming Ni, Lei Shi, Hongchao Liu, Wenna Zhang, Yong Liu, Wenliang Zhu, Zhongmin Liu Halide-free and noble metal-free pyridine-modified H-mordenites exhibit high stability and selectivity in methanol carbonylation to acetic acid.
aNational Engineering Laboratory for Methanol to Olefins, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China E-mail:email@example.com, firstname.lastname@example.org
bDalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, PR China
cUniversity of Chinese Academy of Sciences, Beijing 100049, PR China
Acetic acid is one of the most important bulk commodity chemicals and is currently manufactured by methanol carbonylation reactions with rhodium or iridium organometallic complexes and halide-containing promoters named Monsanto or BP Cativa™ homogeneous processes, respectively. Developing a halide-free catalyst and a heterogeneous process for methanol carbonylation is of great importance and has recently attracted extensive research attention. Here, we report a green route for direct synthesis of acetic acid via vapor-phase carbonylation of methanol with a stable, selective, halide-free, and noble metal-free catalyst based on pyridine-modified H-mordenite zeolite. Methanol conversion and acetic acid selectivity can reach up to 100% and 95%, respectively. Only little deactivation is observed during the 145 hour reaction.
Endo-4,7-bis(hydroxymethyl)hexahydro-1H-4,7-epoxyisoindole-1,3(2H)-dione (endo-4,7- bis(hydroxymethyl)norcantharimide), 4 (method A)
Endo-4,7-bis(hydroxymethyl)norcantharimid-5-ene (120 mg, 0.53 mmol) was dissolved in water (3 mL), Pd/C 10% was added (15 mg) and reaction mixture was placed under hydrogen atmosphere for 8 h at 24 °C. Catalyst was filtered off and washed thoroughly with water (3 × 3 mL), filtrate was evaporated under reduced pressure. Target compound 4 was obtained as white solid, yield 87% (110 mg).
Green Chem., 2017, Advance Article DOI: 10.1039/C7GC02211E, Paper
F. A. Kucherov, K. I. Galkin, E. G. Gordeev, V. P. Ananikov
Efficient one-pot synthesis of tricyclic compounds from biobased 5-hydroxymethylfurfural (HMF) is described using a [4 + 2] cycloaddition reaction.
Efficient route for the construction of polycyclic systems from bioderived HMF
Nelly Tshibalonza was born in 1983 in Kinshasa, Congo. She received her diploma degree in Chemistry in 2006 from the University of Kinshasa. She is currently a fellow of the Belgian Technical Cooperation and is preparing a Ph.D. thesis on the development of catalytic methods to enhance the value of renewable raw materials.
aCenter for Integrated Technology and Organic Synthesis, Department of Chemistry, University of Liège, B-4000 Liège (Sart Tilman), Belgium E-mail:email@example.com
The deoxydehydration (DODH) of glycerol towards allyl alcohol was revisited under continuous-flow conditions combining a microfluidic reactor setup and a unique reactive dynamic feed solution approach. Short reaction times, high yield and excellent selectivity were achieved at high temperature and moderate pressure in the presence of formic acid, triethyl orthoformate, or a combination of both. Triethyl orthoformate appeared as a superior reagent for the DODH of glycerol, with shorter reaction times, lower reaction temperatures and more robust conditions. In-line IR spectroscopy and computations provided different perspectives on the unique reactivity of glycerol O,O,O-orthoesters.
Green Chem., 2017, Advance Article DOI: 10.1039/C6GC03355E, Communication
Pei-Zhi Zhang, Jian-An Li, Ling Zhang, Adedamola Shoberu, Jian-Ping Zou, Wei Zhang
A method for free radical methylation of pyrimidinones and pyridinones with dicumyl peroxide under metal-free conditions is introduced. A 50 g-scale reaction could be performed safely. The product was separated by crystallization and the byproducts were recovery by distillation
Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry and Chemical Engineering, Soochow University, 199 Renai Street, Suzhou, China E-mail: firstname.lastname@example.org
Centre for Green Chemistry and Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Boulevard, Boston, USA E-mail: email@example.com
Green Chem., 2017, Advance Article
A new method for free radical methylation of pyrimidinones and pyridinones with dicumyl peroxide (DCP) under metal-free conditions is introduced. A 50 g-scale reaction could be performed safely at the desired concentration. The reaction solvent and DCP derivative were readily recovered by distillation. The product was purified by crystallization to minimize the amount of waste.
Colorless solid, mp 258−260 °C, 73% yield (191 mg).