299435-95-3Relevant academic research and scientific papers
Development of a novel Br?nsted acid UiO-66 metal-organic framework catalyst by postsynthetic modification and its application in catalysis
Miao, Zongcheng,Qi, Chao,Wensley, Allison M.,Luan, Yi
, p. 67226 - 67231 (2016)
A novel Br?nsted acid derived metal-organic framework (MOF) has been developed to serve as an efficient heterogeneous catalyst for the acetalization and Morita-Baylis-Hillman reaction. Aromatic sulfonic acid groups were successfully incorporated to the framework of UiO-66 by post-synthetic modifications using commercially available anhydridic reagents. The UiO-66-RArSO3H Br?nsted acid catalyst was fully characterized using SEM, PXRD, FTIR, TGA and N2 adsorption/desorption isotherms. Furthermore, efficient acetalization and Morita-Baylis-Hillman reactions were evaluated to demonstrate the high catalytic performance of the UiO-66-RArSO3H catalyst. The UiO-66-RArSO3H catalyst is compatible with a variety of substituted substrates and can be recycled five times without a compromise in the yield or selectivity.
Development of a SO3H-functionalized UIO-66 metal-organic framework by postsynthetic modification and studies of its catalytic activities
Luan, Yi,Zheng, Nannan,Qi, Yue,Yu, Jie,Wang, Ge
, p. 4268 - 4272 (2015/03/30)
A novel metal-organic framework UiO-66-NH2-derived Br?nsted acid catalyst was synthesized on a gram scale by employing a postsynthetic modification strategy under mild conditions. The nanomorphology of the catalyst was designed and developed to enhance its catalytic performance. Acetalization and benzimidazole formation were evaluated to demonstrate the high reactivity and selectivity of the nanoscaled UiO-66-NH-RSO3H catalyst, which were found to be comparable to the reactivity and selectivity of the strong homogeneous Br?nsted acid catalyst. Furthermore, the UiO-66-NH-RSO3H catalyst was recycled several times without compromising the yield and selectivity. A novel metal-organic framework UiO-66-NH2-derived Br?nsted acid catalyst is synthesized by employing a postsynthetic modification strategy under mild conditions. Acetalization and benzimidazole formation are evaluated to demonstrate the high reactivity and selectivity of the nanoscaled UiO-66-NH-RSO3H catalyst.
Preparation of ascorbic acid intermediates
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, (2008/06/13)
A synthetic route to ascorbic acid is provided in which a 3,5:4,6-protected derivative of gulonic acid is prepared from gulono-1,4-lactone. Oxidation of the derivative and hydrolysis of the resulting product affords 2-ketogulonic acid or ester thereof which can be readily converted to ascorbic acid by known methods.
