1, 2-Hydride shift euphene biosyn via squalene-tetrahymanol cyclaseArigoni, D
Synthetic routes are developed to the all-cis- (VIII) and the all-trans-pentamethylcyclopentyl cation (V) as models to study the possibility that the rate of a single 1,2-hydride shift within a series of multiple 1,2-hydride shifts may depend on the overall stereochemistry associated with ...
Mechanism for aldose-ketose interconversion by D-xylose isomerase involving ring opening followed by a 1,2-hydride shift. The active site and mechanism of d-xylose isomerase have been probed by determination of the crystal structures of the enzyme bound to various substrates, ... CA Collyer,K ...
等常见活性中间体的结构、产生的条件和反应性 有机反应机理 2 7.1活性中间体概述 多步反应，生成一个或多个活性中间体 活性中间体的研究是机理研究的一个重要组成部分 确定中间体的存在和结构可以提供有关反应机理的信息，特别是关于过渡态的结构信息 有机反应机理 3 根据Hammond假设，确定活性中间体的结构有助于...
Hybrid quantum mechanical and molecular mechanical (QM/MM) methods are used to estimate the kinetic isotope effects (KIEs) for the 1,2hydride shift reactio... RM Nicoll,SA Hindle,G Mackenzie,... - 《Theoretical Chemistry Accounts》 被引量: 104发表: 2001年 Combined molecular mechanical and qua...
G. G. KAHLEJohn Wiley & Sons, LtdChemischer InformationsdienstEberle, M.K., Kahle, G.G., 1977. A 1,3-hydride shift in the rearrangement of (1- phenylallyl)oxyacetic acid to 2-ethyl-2-phenyl-1,3-dioxolan-4-one. J. Am. Chem. Soc. 99, 6038-6042....
CheminformNishide K, Shigeta Y, Obata K, Node M (1996) Asymmetric 1, 7-hydride shift The highly asymmetric reduction of a, b-unsatu- rated ketones to secondary alcohols via a novel tandem Michael addition/Meerwein-Ponndorf-Verley reduction. J Am Chem Soc 118:13103-13104...
If the adjacent substituent is a trichloroacetyl amino group, 1,5-CH insertion competes with the 1,2-hydride shift, and no 1,3-CH insertion can be observed. Both electronic and steric factors are responsible for the switching of the RhII-carbene reaction pathway. The highly stereoselective 1...
Ni2+(Fig.4i), respectively. The presence of the Ni2+species could be caused by the re-oxidation of the Ni catalyst during the ex-situ measurements16,26. Notably, the Ni2pXPS peaks of the NiSb catalyst shift to higher binding energies by 0.4 eV compared with those of the Ni ...
New aldehyde products from PGH2 and a novel intramolecular 1,2-hydride shift during endoperox... Mise en evidence d'un remarquable effet de solvant sur la stabilite du noyau endoperoxyde dioxa-2,3 bicyclo [2.2.1] heptane, de la prostaglandine PGH2. Eff... RG Salomon,DB Miller,M ...