Results 51 to 60 of about 48,446 (261)

POM@MOF hybrids : synthesis and applications [PDF]

, 2020
The hybrid materials that are created by supporting or incorporating polyoxometalates (POMs) into/onto metal–organic frameworks (MOFs) have a unique set of properties.
Abednatanzi, Sara, Leus, Karen, Liu, Ying-Ya, Sun, Jiamin, Van Der Voort, Pascal   +4 more
core   +1 more source

Epoxidação do óleo de mamona e derivados empregando o sistema catalítico VO(acac)2/TBHP Epoxidation of castor oil and its derivatives using VO(acac)2/TBHP as the catalytic system

Química Nova, 2008
The alternative system VO(acac)2/TBHP was investigated for the epoxidation reaction of castor oil and its derivatives. Results of 88% of conversion, 73% of epoxidation and 82% of selectivity were obtained for the system containing 20% excess of TBHP and ...
Marta Regina dos Santos Nunes, Marcia Martinelli, Marcelo Monteiro Pedroso   +2 more
doaj   +1 more source

Heterogenisation of ketone catalysts within mesoporous supports for asymmetric epoxidation

, 2013
The synthesis of the first mesoporous silica (150 Å) anchored carbohydrate-derived chiral ketone is described. This new heterogeneous catalyst has been shown to be effective in the asymmetric epoxidation of olefins by oxone.
Adam, Aggarwal, Amadori, Amadori, Armstrong, Beckwith, Bellamy, Bloch, Caprio, Chadwick, Cho, Corey, Denmark, Denmark, Denmark, Dondoni, Farina, Frohn, Goeddel, Heitbaum, Hutchings, Jacobsen, Johansson Seechurn, Johnson, Johnson, Jones, Katsuki, McMorn, Page, Page, Pedragosa-Moreau, Raja, Raynor, Ren, Romesberg, Ross, Sartori, Shephard, Shu, Song, Stearman, Thomas, Thomas, Thomas, Tian, Tian, Tian, van den Broek, Wang, Wang, Wang, Wang, Wong, Wong, Xia, Xiong, Xuereb, Yang, Yang, Zhao, Zhu   +60 more
core   +1 more source

Attempted Synthesis of Vinca Alkaloids Condensed with Three-Membered Rings

Molecules, 2018
Our successful work for the synthesis of cyclopropanated vinblastine and its derivatives by the Simmons–Smith reaction was followed to build up further three-membered rings into the 14,15-position of the vindoline part of the dimer alkaloid ...
András Keglevich, Szabolcs Mayer, Réka Pápai, Áron Szigetvári, Zsuzsanna Sánta, Miklós Dékány, Csaba Szántay, Péter Keglevich, László Hazai   +8 more
doaj   +1 more source

Iminologous Epoxide Ring-Closure

Chemical Science, 2022
Herein, we apply the principle of iminology to the well-established epoxide ring-closure reaction. The synthesis of tetrasubstituted, nitrile-tethered epoxides can be achieved via activation of iminologous diols followed by fragmentation. Mechanistic study reveals the transformation to be stereoretentive, which is consistent with the concerted nature ...
Chieh-Hung Tien, Alan J. Lough, Andrei K. Yudin   +2 more
openaire   +2 more sources

Synthesis of siloxane-containing epoxy polymers Patent [PDF]

, 1970
Synthesis of siloxane containing epoxy polymers with low dielectric ...
Patterson, W. J.
core   +1 more source

Characterization of Bio‐Based Phenolic Plasticizer Extracted From Rambutan Fruit Shell Waste: A Sustainable Alternative to Synthetic Plasticizers for Green Polymer Applications

Journal of the American Oil Chemists' Society, EarlyView.
Comprehensive Characterization of Bio‐Based Phenolic Plasticizer Extracted From Rambutan Fruit Shell Waste. ABSTRACT The development of eco‐friendly plasticizer is driving the interest of many scientists due to its environmentally benign nature.
Divya Divakaran, Indran Suyambulingam, Sunesh Narayanaperumal, Nadir Ayrilmis, Murugesan Palaniappan, Sivasubramanian Palanisamy, P. Senthamaraikannan, Siva Avudaiappan   +7 more
wiley   +1 more source

Glutaraldehyde-crosslinked Rhizopus oryzae whole cells show improved catalytic performance in alkene epoxidation

Microbial Cell Factories, 2023
Background Existing methods for alkene epoxidation are based on lipase-catalysed perhydrolysis. However, the inactivation of the expensive lipase enzyme is problematic for enzymatic epoxidation at large scales due to the use of hydrogen peroxide and ...
Lili Xu, Yimin Qin, Yufeng Song, Aixing Tang, Youyan Liu   +4 more
doaj   +1 more source

Unveiling the Roles of Ti Species and Solvent in Propylene Epoxidation With H2O2 Over Titanosilicate‐1 Catalyst Through Density Functional Theory Insights

Carbon and Hydrogen, EarlyView.
This work employs density functional theory (DFT) calculations to identify the reaction mechanism and unveil the roles of Ti species and solvent in propylene epoxidation with H2O2 over TS‐1 catalyst. ABSTRACT The mechanism of propylene epoxidation catalyzed by distinct titanium (Ti) species within the TS‐1 framework was systematically explored through ...
Junxi Chen, Xue Wei, Xinyue Wang, Xiaowa Nie, Xinwen Guo   +4 more
wiley   +1 more source

Research Progress in Epoxidation of Light Small-Molecule Olefins

Molecules
Light olefins, as important bulk raw materials in the petrochemical industry, play an irreplaceable role in the development of the manufacturing industry and the economy.
Guanghui Zhao, Tianfu Yang, Jincheng Liu, Xianming Xu, Yulong Wang, Yongjun Zhang, Meng Gao, Chao Xiong, Hongbing Ji   +8 more
doaj   +1 more source