非经典镧系 (II) 碘化物是用于开发具有挑战性的电子转移过程的现代试剂。事实证明,醇对于从 TmI 2(二碘化铥)(该系列中的第一种非经典镧系元素 (II) 碘化物(TmI 2、 DyI 2、 NdI 2 ))形成热力学更强大的还原剂至关重要。TmI 2 (ROH) n试剂促进酰胺中 σ C N 键前所未有的断裂。
Novel catalytic effects in ester aminolysis in chlorobenzene
作者:Nuno Basilio、Luís García-Río、J. Ramón Leis、Juan C. Mejuto、Moisés Pérez-Lorenzo
DOI:10.1039/b504629g
日期:——
The mechanism of glyme catalyzed esteraminolysis in chlorobenzene should be modified by including a new reaction pathway that shows a first-order dependence on the concentration of the phase transfer catalyst and a second-order dependence on butylamine.
A traction drive fluid composition comprising the following component (A),
wherein R1 to R10 are hydrogen, C1-C3 alkyl, or cyclohexyl, Q1 to Q4 are C1-C3 alkyl or cyclohexyl, and n1 to n4 are an integer from 0 to 5; component (B) which is a heat copolymer of a cyclopentadiene compound and a vinyl aromatic hydrocarbon compound or a hydrogenated product of thereof having a softening point of 40°C or higher or a weight average molecular weight of 250 or larger; and, optionally, component (C) which is a compound with a viscosity smaller than that of component (A); a phosphorous compound; and a friction modifier. The composition exhibits a high traction coefficient over a wide temperature range and excellent friction characteristics required for a traction drive device.
Ligands for prevention of neurotoxicity of the alzheimer's disease related amyloid-beta peptide
申请人:AlphaBeta AB
公开号:US10023610B2
公开(公告)日:2018-07-17
The present invention relates to the field of molecular biochemistry and medicine, and in particular to ligands comprising modified amino acid residues, targeting the amyloid-β peptide associated with Alzheimer's disease for prevention of aggregation, neurotoxicity and use thereof as drugs for treatment of Alzheimer's disease.
Chili Pepper Fruits: Presumed Precursors of Fatty Acids Characteristic for Capsaicinoids
作者:Roland Thiele、Erika Mueller-Seitz、Michael Petz
DOI:10.1021/jf073420h
日期:2008.6.1
Capsaicin is a molecule unique to fruits from the genus Capsicum. It is responsible for the pungent sensation and displays valuable pharmacological properties. Despite the fruits' economic importance and decades of research, the regulation of the content of capsaicinoids in individual fruits is not completely elucidated, and no agricultural cultivation of chili of defined pungency is assured. Precursor candidates of the fatty acid moiety of the capsaicinoids, especially for the unique 8-methyl-trans-6-nonenoic acid, were examined. Thioesters, acyl-ACP and acyl-CoA, were isolated from the placenta of Capsicum fruits by means of DEAE-Sepharose chromatography, selectively converted to the corresponding N-butylamides, and analyzed by GC-MS. Fatty acid moieties characteristic for capsaicinoids were identified. In two different varieties (Capsicum chinense var. Habanero orange and Capsicum annuum var. Jalapeno) it was shown that the fatty acid pattern corresponds to the distribution pattern of the capsaicinoids formed up to this time. The acyl-thioester fractions contained already the 8-methyl-trans-6-nonenoic acid.
Polshettiwar, Vivek; Kaushik, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2005, vol. 44, # 4, p. 773 - 777