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نتایج جستجو برای Amine functionalization

تعداد نتایج: 17755  
2012
Amit A. Nagarkar, Aurelien Crochet, Katharina M. Fromm, Andreas F. M. Kilbinger,

An efficient strategy for the synthesis of monoamine end-functionalized living polymers using ringopening metathesis polymerization with ruthenium initiators is reported. A new end-capping agent for this purpose was synthesized, and its efficiency for end-functionalization was evaluated using two common ruthenium-based initiators. Finally, terminal cross-metathesis was also explored as another ...

Journal: :Chemical communications 2016
P Veeraraghavan Ramachandran, Ameya S Kulkarni, Yan Zhao, Jianguo Mei,

The first general open-flask synthesis of amine-boranes with inexpensive and readily available reagents, such as sodium borohydride, sodium bicarbonate, water, and the desired amines is described. Even amines bearing borane-reactive functionalities, such as alkene, alkyne, hydroxyl, thiol, ester, amide, nitrile, and nitro are well tolerated. Some of these novel amine-boranes represent stable mo...

Journal: :Chemical communications 2011
Guillaume Vives, Carlo Giansante, Robin Bofinger, Guillaume Raffy, André Del Guerzo, Brice Kauffmann, Pinar Batat, Gediminas Jonusauskas, Nathan D McClenaghan,

Selective nucleophilic substitution on a perfluorophenyl unit comprising a BODIPY fluorophore using an alkanethiol or a primary amine offers a quantitative fluorophore labelling strategy, while retaining high photostability and emission quantum yields approaching unity.

2015
Joel W. Beatty, Corey R. J. Stephenson,

While the use of visible light to drive chemical reactivity is of high importance to the development of environmentally benign chemical transformations, the concomitant use of a stoichiometric electron donor or acceptor is often required to steer the desired redox behavior of these systems. The low-cost and ubiquity of tertiary amine bases has led to their widespread use as reductive additives ...

Journal: :Dalton transactions 2015
Nakeun Ko, Jisu Hong, Siyoung Sung, Kyle E Cordova, Hye Jeong Park, Jin Kuk Yang, Jaheon Kim,

The functionalization of UiO-67 with -NH2 groups enhances CO2 and CH4 adsorption at 1 bar and 298 K and positively influences the framework's interaction with water as evidenced by the significant enhancement of water vapour adsorption at 0.1 < P/P0 < 0.3 and 298 K.

Journal: :Chemical communications 2009
Huafeng Yang, Changsheng Shan, Fenghua Li, Dongxue Han, Qixian Zhang, Li Niu,

A facile method to obtain polydisperse chemically-converted graphene sheets that are covalently functionalized with ionic liquid was reported -- the resulting graphene sheets, without any assistance from polymeric or surfactant stabilizers, can be stably dispersed in water, DMF, and DMSO.

Journal: :Biomaterials 2007
Stephen Rimmer, Claire Johnson, Bojun Zhao, Joyleen Collier, Louisa Gilmore, Subodh Sabnis, Paul Wyman, Christopher Sammon, Nigel J Fullwood, Sheila MacNeil,

The aim of this study was to develop a hydrogel which would be suitable for corneal cell re-epithelialization when used as a corneal implant. To achieve this, a series of hydrogels were functionalized with primary amines by post-polymerization reactions between amine compounds and glycidyl ether groups attached to the hydrogels. We report a strong correlation between the structure of the amine ...

2017
Pankaj Jain, Pritha Verma, Guoqin Xia, Jin-Quan Yu,

Saturated aza-heterocycles are highly privileged building blocks that are commonly encountered in bioactive compounds and approved therapeutic agents. These N-heterocycles are also incorporated as chiral auxiliaries and ligands in asymmetric synthesis. As such, the development of methods to functionalize the α-methylene C-H bonds of these systems enantioselectively is of great importance, espec...

2012
Sarah Couck, Joeri Denayer,

Reducing the CO2 levels in the atmosphere is one of the emerging challenges for human society. It is commonly accepted that CO2, as a greenhouse gas, is partly responsible for climate changes. It is thus important to reduce those CO2 levels in every possible way. This can be achieved in different manners, for example by decreasing CO2 emission by developing energy efficient processes with a red...

Journal: :Dalton transactions 2014
Anupam Khutia, Christoph Janiak,

MIL-101Cr fully or partially (p) postsynthetically modified with nitro (-NO2) or amino (-NH2) groups was shown to be a robust, water stable, selective and enhanced carbon dioxide (CO2) adsorption material with the amine-functionality. The highly microporous amine-modified frameworks (up to 1.6 cm(3) g(-1) total pore volume) exhibit excellent thermal stability (>300 °C) with BET surface areas up...