Results 31 to 40 of about 4,063 (203)

Generation of Molecular Complexity from Cyclooctatetraene: Preparation of Aminobicyclo[5.1.0]octitols [PDF]

, 2015
A series of eight stereoisomeric N-(tetrahydroxy bicyclo-[5.1.0]oct-2S*-yl)phthalimides were prepared in one to four steps from N-(bicyclo[5.1.0]octa-3,5-dien-2-yl)phthalimide (±)-7, which is readily available from cyclooctatetraene (62 % yield).
Donaldson, William, El-Mansy, Mohamed F., Flister, Matthew, Kalous, Kelsey S, Lindeman, Sergey, Sem, Daniel S.   +5 more
core   +2 more sources

Control of Precipitation of Cellulose Solutions in N-Methylmorpholine-N-oxide by Introducing Polyacrylonitrile Additives

Polysaccharides
The precipitation of cellulose and polyacrylonitrile and its copolymer (PAN) solutions is a well-known process that has been extensively described in numerous studies.
Maria Mironova, Igor Makarov, Ekaterina Palchikova, Georgy Makarov, Markel Vinogradov, Maxim Orlov, Ivan Komarov   +6 more
doaj   +1 more source

The Effect of Alcohol Precipitants on Structural and Morphological Features and Thermal Properties of Lyocell Fibers

Fibers, 2020
This research examines the possibilities of regulating the structure of cellulose precursor fibers spun from solutions in N-methylmorpholine-N-oxide when replacing aqueous coagulation baths with thermodynamically softer alcohol baths at different ...
Igor S. Makarov, Lyudmila K. Golova, Markel I. Vinogradov, Ivan S. Levin, Georgiy A. Shandryuk, Natalia A. Arkharova, Yaroslav V. Golubev, Anna K. Berkovich, Timofei V. Eremin, Elena D. Obraztsova   +9 more
doaj   +1 more source

Enantioselective Organocatalytic Intramolecular Diels−Alder Reactions. The Asymmetric Synthesis of Solanapyrone D [PDF]

, 2005
The first direct enantioselective organocatalytic intramolecular Diels−Alder reaction has been accomplished. The use of iminium catalysis has provided a new catalytic strategy for the enantioselective [4 + 2] cycloisomerization of a wide variety of ...
Jen, Wendy S., MacMillan, David W. C., Wilson, Rebecca M.   +2 more
core   +1 more source

Lyocell Fibre Production Using NMMO – A Simulation-based Techno-Economic Analysis

BioResources, 2023
The demand for man-made cellulosic fibres is expected to grow in the future. One commercially-available concept to supply fibres is Lyocell manufacturing from dissolving wood pulps using N-Methylmorpholine N-oxide (NMMO) as the solvent.
Eemeli Hytönen, Lotta Sorsamäki, Erik Kolehmainen, Michael Sturm, Niklas von Weymarn   +4 more
doaj   +2 more sources

Effect of Alkyl Substituents on the Hydrogen Catalytic Osmylation of Cis and Trans 2-Cyclohexene-Cyclohexanol [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 1995
Catalytic osmylation of cis and trans 2-cyclohexene-cyclohexanol (1a) and (1b) are carried out in the presence of N-methyl morpholine-N-oxide. Under the same conditions, only the cis isomer reacted, leading to triol (3).
Mohammad Raouf Darvich, Jamshid Mohammadi Rovshandeh   +1 more
doaj  

Electrospun nanosized cellulose fibers using ionic liquids at room temperature [PDF]

, 2011
Aiming at replacing the noxious solvents commonly employed, ionic-liquid-based solvents have been recently explored as novel non-volatile and non-flammable media for the electrospinning of polymers.
Abbott, Abbott, Abbott, Ana Rita R. Teles, Blesic, Carvalho, Freire, Frey, Fukaya, Gavrilov, Ghatee, José A. Lopes-da-Silva, João A. P. Coutinho, Klemm, Lee, Liang, Lopes-da-Silva, Lu, Lu, Luís D. Carlos, Ma, Magalhães, Mara G. Freire, Meli, Miyauchi, Nelson, Neves, Neves, O'Connor, Oliveira, Quan, Remsing, Rute A. S. Ferreira, Schiffman, Segal, Seo, Sescousse, Sun, Sung, Swatloski, Tomé, Vasita, Viswanathan, Wistara, Xu, Xu, Yang, Yang, Yoon, Zhao   +49 more
core   +2 more sources

Selective Hydrogenation of Formamide to Methanol Over Supported Platinum Catalysts

Angewandte Chemie International Edition, EarlyView.
Amine–CO2 adducts can be hydrogenated to formamides and subsequently to methanol under mild conditions (<150°C), establishing an integrated CO2 capture‐and‐conversion route in a heterogeneous system that directly links amine sorbent cycling with methanol synthesis.
Xuetao Qin, XinXin Tian, Shou Qiu, Han Yan, Haijun Jiao, Henrik Junge, Matthias Beller   +6 more
wiley   +1 more source

Recovery of N-Methylmorpholine N-Oxide (NMMO) in Lyocell Fibre Manufacturing Process

Fibers
The lyocell process offers an environmentally friendly strategy to produce regenerated cellulose fibre from biomass. However, it is critical to recover and reuse the N-methyl-morpholine-N-oxide (NMMO) solvent to maximize the environmental benefits and ...
Maria Sawiak, Bernardo A. Souto, Lelia Lawson, Joy Lo, Patricia I. Dolez   +4 more
doaj   +1 more source

Regenerated Cellulose/Graphene Composite Fibers with Electroconductive Properties

AUTEX Research Journal, 2020
Conductive cellulose fibers may find application in producing antistatic materials and fibrous electronic elements for smart textiles (textronics). In this paper, we present a method of fabrication of cellulose fibers modified with the reduced graphene ...
Piotr Kulpinski, Jeszka Jeremiasz K., Artur Malolepszy, Leszek Stobinski   +3 more
doaj   +1 more source