- A robust microporous metal-organic framework constructed from a flexible organic linker for highly selective sorption of methanol over ethanol and water
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A microporous metal-organic framework MOF 1 [Zn(L)2(methanol) 2] (H2L = (1R,3S)-1,2,2-trimethyl-3-(pyridin-4- ylcarbamoyl)cyclopentanecarboxylic acid) constructed from a flexible Zn 2+ node and a flexible organic linker L was obtained by solvothermal reaction of diamond topology, and exhibits highly selective sorption of methanol over ethanol and water.
- Huang, Qian,Cai, Jianfeng,Wu, Hui,He, Yabing,Chen, Banglin,Qian, Guodong
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experimental part
p. 10352 - 10355
(2012/08/27)
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- NOVEL COMPOUNDS AS CANNABINOID RECEPTOR LIGANDS
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The present application relates to isothiazolylidene containing compounds of Formula (I) wherein R1, R2, R3, R4, and L are as defined in the specification, compositions comprising such compounds, and methods for treating conditions and disorders using such compounds and compositions.
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Page/Page column 145-146; 147-148
(2010/06/11)
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- Two chiral nonlinear optical coordination networks based on interwoven two-dimensional square grids of double helices
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Two new chiral two-dimensional coordination networks, ZnL 2(H2O)2 (1) and CdL2(H 2O)2 (2) [L = 1,2,2-trimethyl-3-(pyridin-4-ylcarbamoyl) cyclopentanecarboxylic acid], have been synthesized and structurally characterized by single X-ray structure analysis, featuring very unusual interwoven (4,4) square grids of double helices. The frameworks exhibit high thermal stability as confirmed by thermogravimetric analysis and powder X-ray diffraction studies. The unique chiral networks attributed to the chiral organic linker have led to their nonlinear optical properties.
- Huang, Qian,Yu, Jiancan,Gao, Junkuo,Rao, Xingtang,Yang, Xiuli,Cui, Yuanjing,Wu, Chuande,Zhang, Zhangjing,Xiang, Shengchang,Chen, Banglin,Qian, Guodong
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scheme or table
p. 5291 - 5296
(2011/10/12)
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- Carbenoid pathways in copper-catalyzed intramolecular cyclopropanations of phenyliodonium ylides
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The enantioselectivity of the copper-catalyzed intramolecular cyclopropanation of allyl diazomalonates and the corresponding phenyliodonium ylides was investigated with a series of chiral, non-racemic ligands. The reaction of 6b in the presence of the bis[dihydrooxazole] ligand Xa in refluxing 1,2-dichloroethane proceeded to 8b with an enantiomer excess (ee) of up to 72% under optimized conditions. In contrast, 8b resulting from reaction of ylide 7b with the same ligand, but in CH2Cl2 at 0°, had an ee of only 30%. With other ligands, diazomalonate 6b reacted with a lower enantioselectivity than ylide 7b, however. The intramolecular cyclopropanation of the acetoacetate-derived phenyliodonium ylide 15b afforded 16b with 68% ee with ligand Xa, but the corresponding diazo compound was unreactive when exposed to chiral copper catalysts. The observation of asymmetric induction in the Cu-catalyzed reactions of the ylides 7 and 15 is consistent with a carbenoid mechanism however, the discrepancy of the enantioselectivities observed between diazomalonate 6b and ylide 7b suggests a competing unselective pathway for cyclopropanation outside of the coordination sphere of copper.
- Mueller, Paul,Bolea, Christelle
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p. 1093 - 1111
(2007/10/03)
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- Chiral carboxylic acid ligands derived from camphoric acid
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Versatile and convenient preparations of chiral carboxylic acid ligands, derived from camphoric acid, are described, either by esterification of camphoric dichloride or by a regioselective opening of the corresponding anhydride by a variety of alcohols or diols.
- Moloney, Mark G.,Paul, Diana R.,Thompson, Russell M.,Wright, Emma
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p. 2551 - 2562
(2007/10/03)
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