Journal of the Chinese Chemical Society
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Ionic Liquid as an Efficient Promoting Medium for Synthesis of Bis‐Pyrazolo[3,4‐b:4′,3′‐e]PyridinesAbstract The preparation of a series of bis‐pyrazolo[3,4‐b:4′,3′‐e]pyridines by the reaction of 5‐aminopyrazole with aldehydes in ionic liquid [bmim]Br is described. This new method has the advantages of easier work‐up, milder reaction conditions, high yields and environmental friendliness compared with other methods.
Journal of the Chinese Chemical Society - Tập 55 Số 4 - Trang 755-760 - 2008
The Isolation and Determination of Sulforaphane from Broccoli Tissues by Reverse Phase‐High Performance Liquid ChromatographyAbstract Sulforaphane is a cognate isothiocyanate of glucoraphanin, released by degradation of glucosinolate through myrosinase enzyme, when Brassica tissues are crushed or chewed. C8 analytical column and mixture of water/acetonitrile 65/35 (ν/ν) as mobile phase were used to separate sulforaphane in broccoli tissues (e.g., 7‐day‐seedling, seed,... ... hiện toàn bộ
Journal of the Chinese Chemical Society - Tập 58 Số 7 - Trang 906-910 - 2011
Phenolic Compounds from Formosan Euphorbia tirucalliAbstract Fourteen polyphenolic compounds were isolated from the 60% aqueous acetone extract of Formosan Euphorbia tirucalli L. (Euphorbiaceae). Two compounds, 5‐desgalloylstarchyurin and 3,3′,4‐tri‐O ‐methyl‐4′‐O ‐rutinosyl ellagic acid, were deduced by concerted application of 1D and 2D ...
Journal of the Chinese Chemical Society - Tập 48 Số 1 - Trang 105-108 - 2001
Constituents of the Heartwood of Diospyros ErianthaAbstract The isolation and identification of fifteen compounds from the heartwood of Diospyros eriantha are described. Their structures were determined on the basis of spectral evidence and/or comparison with authentic samples. These compounds include three steroids (stigmast‐4‐en‐3‐one, stigmast‐4‐ene‐3,6‐dione, and 3β‐hydroxystigmast‐5‐e... ... hiện toàn bộ
Journal of the Chinese Chemical Society - Tập 41 Số 2 - Trang 195-198 - 1994
Trace Determination of Benzalkonium Chlorides in River and Wastewater by Capillary Electrophoresis following Solid‐Phase Extraction Coupled with Salting‐Out ExtractionAbstract Trace levels analysisbenzalkonium chlorides (BAKs) in river water and wastewater treatment plants (WWTP) effluents were determined by capillary electrophoresis (CE) following solid‐phase extraction (SPE) and salting‐out extraction. Salting‐out extraction using an appropriate ratio of sodium chloride (NaCl) and acetonitrile (ACN) mixed with concentrated SPE ... ... hiện toàn bộ
Journal of the Chinese Chemical Society - Tập 55 Số 5 - Trang 1049-1054 - 2008
Applications of Highly Sulfated Cyclodextrins for Enantiomeric Separation by Capillary ElectrophoresisAbstract Separation of enantiomeric pairs of compounds by capillary electrophoresis (CE) was performed using highly sulfated α‐, β‐ and γ‐cyclodextrins (HS‐CDs). CE analysis of the HS‐CDs using indirect absorbance detection showed that the new class of chiral selectors has substantially higher degrees of sulfation and narrower heterogeneity than those used in previo... ... hiện toàn bộ
Journal of the Chinese Chemical Society - Tập 46 Số 5 - Trang 847-860 - 1999
Synthesis of (3,5‐Aryl/methyl‐1H‐Pyrazol‐1‐yl)‐(5‐Arylamino‐2H‐1,2,3‐Triazol‐4‐yl)MethanoneAbstract Some new (3,5‐aryl/methyl‐1H ‐pyrazol‐1‐yl)‐(5‐arylamino‐2H ‐1,2,3‐triazol‐4‐yl)methanones were synthesized and characterized by 1 HNMR, 13 C NMR, MS, IR spectra data and elemental analyses or high resolution mass spectra (HRMS). During the procedure, Dimroth rearran...
Journal of the Chinese Chemical Society - Tập 55 Số 4 - Trang 761-767 - 2008
Tandem Thermal Reactions for the Synthesis of JasmonoidsAbstract A tandem reaction tactic for the preparation of a jasmonoid intermediate consists of pyrolysis of a spiroannulated cyclopentanone. The thermal decomposition actually involves a retro‐Diels‐Alder reaction and a homo‐1,5‐hydrogen shift with cleavage of the cyclopropane unit.
Journal of the Chinese Chemical Society - Tập 45 Số 2 - Trang 319-321 - 1998
A Journey of Metal‐metal Bonding beyond Cotton's Quadruple BondsAbstract Whereas the study of the Cotton's quadruple bonding between two metal atoms has been mature, exploration of bonding, potential applications and reactivity in linear oligonuclear metal complexes and quintuple bonded dinuclear compounds is currently underway. Stabilized by four long‐chain organic ligands containing various numbers (3‐13) of nitrogen donors, m... ... hiện toàn bộ
Journal of the Chinese Chemical Society - Tập 61 Số 1 - Trang 9-26 - 2014
The One‐Pot Synthesis of 2,4,5‐Triaryl‐Imidazoles Using Heteropolyacids as Heterogeneous and Recyclable CatalystsAbstract 2,4,5‐triaryl imidazoles were obtained in high yields with excellent purity from the condensation of benzaldehydes, NH4 OAc and 1,2‐diketone in the presence of a catalytic amount of various heteropolyacids (HPAs).
Journal of the Chinese Chemical Society - Tập 55 Số 6 - Trang 1199-1203 - 2008
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