- Synthesis of sulfonic acid-functionalized MIL-101 for acetalization of aldehydes with diols
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A metal-organic framework (MOF) MIL-101 bearing sulfonic acid groups (SO3H-MIL-101), was prepared through one-pot hydrothermal synthesis strategy. This MOF was systemically characterized via XRD, N2 adsorption, acid-base titration, XPS, FT-IR techniques, and elemental analysis, and then used as a heterogeneous catalyst for liquid-phase acetalizations of various aldehydes with diols. The obtained SO3H-MIL-101 shows high catalytic activity in the acetalizations due to the high utilization efficiency of its functionalized acid sites. Additionally, this catalyst can be easily recovered and reused five times in succession without significant loss of catalytic activity.
- Jin, Yan,Shi, Jing,Zhang, Fumin,Zhong, Yijun,Zhu, Weidong
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p. 167 - 171
(2014/01/17)
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- Iodine-catalyzed tandem synthesis of terminal acetals and glycol mono esters from olefins
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A new metal-free protocol is described for the synthesis of terminal acetals by tandem oxidative rearrangement of olefins using oxone as an oxidant in the presence of iodine. Moreover, a one-pot procedure for the preparation of glycol mono esters from olefins is also presented for the first time using the same reagent system. The Royal Society of Chemistry 2013.
- Kumar, Macharla Arun,Swamy, Peraka,Naresh, Mameda,Reddy, Marri Mahender,Rohitha, Chozhiyath Nappunni,Prabhakar, Sripadi,Sarma, Akella Venkata Subrahmanya,Kumar, Joseph Richard Prem,Narender, Nama
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supporting information
p. 1711 - 1713
(2013/03/14)
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- Acetalization of carbonyl compounds catalyzed by acidic ionic liquid immobilized on silica gel
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Imidazolium-silica heterogeneous catalyst (SG-[(CH2) 3SO3H-HIM]HSO4) was prepared by immobilization of acidic ionic liquid 1-(propyl-3-sulfonate) imidazolium hydrosulfate ([(CH2)3SO3H-HIM]HSO4) on silica-gel using tetraethoxysilane (TEOS) as silica source in this study. The properties of the samples were characterized by FT-IR, SEM and TG/DSC. The results suggested that [(CH2)3SO3H-HIM]HSO4 had been successfully immobilized on the surface of silica-gel and the immobilized ionic liquid catalyst SG-[(CH2)3SO 3H-HIM]HSO4 had good thermal stability. The original smooth surface of silica-gel was covered with [(CH2) 3SO3H-HIM]HSO4 and a rough surface of SG-[(CH2)3SO3H-HIM]HSO4 was formed, but the size of particles had no obvious change. Moreover, SG-[(CH 2)3SO3H-HIM]HSO4 exhibited high catalytic activity for a series of acetalization and could be recovered easily. After reused for 10 times in the synthesis of benzaldehyde ethanediol acetal, the catalyst could still give satisfactory catalytic activity.
- Miao, Jinmei,Wan, Hui,Shao, Yanbing,Guan, Guofeng,Xu, Bin
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experimental part
p. 77 - 82
(2011/11/07)
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