A highly efficient catalytic kinetic resolution of 2,3-epoxy 3-aryl ketones via asymmetric ring-opening with pyrazole derivatives has been achieved by using a chiral N,N′-dioxide–Sc(iii) complex as the catalyst.
Magnetic Nano-Fe<sub>3</sub>O<sub>4</sub>-Supported 1-Benzyl-1,4-dihydronicotinamide (BNAH): Synthesis and Application in the Catalytic Reduction of α,β-Epoxy Ketones
A novel magnetically recoverable organichydridecompound was successfully constructed by using silica-coated magnetic nanoparticles as a support. An as-prepared magnetic organichydridecompound, BNAH (1-benzyl-1,4-dihydronicotinamide), showed efficient activity in the catalytic reduction of α,β-epoxy ketones. After reaction, the magnetic nanoparticle-supported BNAH can be separated by simple magnetic
Capture compounds, collections thereof and methods for analyzing the proteome and complex compositions
申请人:Köster Hubert
公开号:US20110118136A1
公开(公告)日:2011-05-19
Capture compounds and collections thereof and methods using the compounds for the analysis of biomolecules are provided. In particular, collections, compounds and methods are provided for analyzing complex protein mixtures, such as the proteome. The compounds are multifunctional reagents that provide for the separation and isolation of complex protein mixtures. Each compound has the formula:
wherein: Z is a trityl derivative; X, the reactivity function, covalently binds to amino acid side chains of proteins; Y, the selectivity function, modulates binding of X to the amino acid side chains in proteins such that X binds to fewer proteins when Y is present than in its absence; and Q permits separation or immobilization of the capture compound. Automated systems for performing the methods also are provided.
Joerlander, Chemische Berichte, 1917, vol. 50, p. 1460
作者:Joerlander
DOI:——
日期:——
Catalytic Hydrogenation of α,β-Epoxy Ketones to Form β-Hydroxy Ketones Mediated by an NADH Coenzyme Model
作者:Hua-Jian Xu、You-Cheng Liu、Yao Fu、Yun-Dong Wu
DOI:10.1021/ol0610892
日期:2006.8.1
The hydrogenation of alpha,beta-epoxy ketones can be mediated by a catalytic amount of BNAH or BNA(+) Br- to form corresponding,beta-hydroxy ketones in high yield. Na2S2O4 is used as the reducing agent to convert BNA(+) Br- to BNAH. A radical mechanism has been proposed to understand many observations of this catalytic reaction.