29494-49-3Relevant academic research and scientific papers
Metal-Free, Visible-Light-Induced Selective C?C Bond Cleavage of Cycloalkanones with Molecular Oxygen
Xin, Hong,Duan, Xin-Hua,Liu, Le,Guo, Li-Na
supporting information, p. 11690 - 11694 (2020/08/21)
A metal-free, visible-light-induced oxidative C?C bond cleavage of cycloketones with molecular oxygen is described. Cooperative Br?nsted-acid catalysis and photocatalysis enabled selective C?C bond cleavage of cycloketones to generate an array of γ-, δ- and ?-keto esters under very mild conditions. Mechanistic studies indicate that singlet molecular oxygen (1O2) is responsible for this transformation.
A novel, mesoporous molybdenum doped titanium dioxide/reduced graphene oxide composite as a green, highly efficient solid acid catalyst for acetalization
He, Junkai,Kankanam Kapuge, Tharindu,Kerns, Peter,Meguerdichian, Andrew G.,Suib, Steven L.,Thalgaspitiya, Wimalika R. K.
, p. 3786 - 3795 (2020/04/03)
A novel, mesoporous composite of Mo doped TiO2/reduced graphene oxide is synthesized to be used as a highly efficient heterogeneous acid catalyst. The composite has a high surface area (263 m2 g-1) and a monomodal pore size distribution with an average pore diameter of 3.4 nm. A comprehensive characterization of the synthesized material was done using PXRD, Raman, BET, SEM, EDX, TEM, TGA, and XPS. The composite exhibited excellent catalytic activity (1.6 h-1 TOF, >99% GC yield, and >99% selectivity) towards acetalization of cyclohexanone at room tempertaure within 30 minutes. The catalyst was reusable up to 4 reaction cycles without any significant loss in the activity and the acidic site calculations showed that the reaction is mostly driven by the weak acidic sites on the composite.
Zeolite nanofiber assemblies as acid catalysts with high activity for the acetalization of carbonyl compounds with alcohols
Liu, Taotao,Fu, Wenqian,Zheng, Xiang,Jiang, Jun,Hu, Maolin,Tang, Tiandi
, p. 18217 - 18221 (2014/05/20)
Zeolite nanofiber assemblies (HNB-MOR) as efficient heterogeneous catalysts for the formation of a range of acetals in good yields. The mesoporosity of HNB-MOR benefits mass transfer, and the strong acidic sites on HNB-MOR facilitate acetalization activity. The catalyst can be reused 10 times without loss of activity.
TRIMETHYLSILYL TRIFLATE IN ORGANIC SYNTHESIS
Noyori, R.,Murata, S.,Suzuki, M.
, p. 3899 - 3910 (2007/10/02)
Trimethylsilyl triflate is a powerful silylating agent for organic compounds and acts as a catalyst which accelerates a variety of nucleophilic reactions in aprotic media.The reactions proceed via one-center, electrophilic coordination of the silyl group to hetero functional groups and exhibit unique selectivities.
A FACILE PROCEDURE FOR ACETALIZATION UNDER APROTIC CONDITIONS
Tsunoda, T.,Suzuki, M.,Noyori,R.
, p. 1357 - 1358 (2007/10/02)
Carbonyl compounds are readily acetalized by alkoxysilanes in the presence of trimethylsilyl trifluoromethanesulfonate catalyst.
