Oxidovanadium(V) complexes with chiral tridentate Schiff bases derived from R(−)-phenylglycinol: Synthesis, spectroscopic characterization and catalytic activity in the oxidation of sulfides and styrene
摘要:
A series of vanadium(V) complexes with chiral tridentate Schiff base ligands, obtained by the single condensation of R(-)-phenylglycinol with salicylaldehyde and its derivatives, were prepared. The complexes were characterized by elemental analysis and by their ESI-MS, IR, CD, UV-Vis, 1D (H-1, V-51) and 2D (COSY, gHSQC) NMR spectra. The vanadium(V) complexes have the ability to catalyze the oxidation of sulfides [PhSR (R = Me, Bz)] in excellent yields and enantiomeric excesses (over 90%), utilizing aqueous 30% H2O2 or cumene hydroperoxide (CHP) as the oxidant. These complexes are also catalytically active in the oxidation of styrene, using aqueous 30% H2O2 or tert-butyl hydroperoxide (TBHP) as the oxidant, to styrene oxide, benzaldehyde, benzoic acid, phenylacetaldehyde and 1-phenylethane-1,2-diol. (C) 2013 Elsevier Ltd. All rights reserved.
ONIUM SALT COMPOUND, CHEMICALLY AMPLIFIED RESIST COMPOSITION AND PATTERNING PROCESS
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:US20210179554A1
公开(公告)日:2021-06-17
An onium salt having formula (1) serving as an acid diffusion inhibitor and a chemically amplified resist composition comprising the acid diffusion inhibitor are provided. When processed by lithography, the resist composition exhibits a high sensitivity, and excellent lithography performance factors such as CDU and LWR.
Chiral Diacylhydrazine Ligands for Modulating the Expression of Exogenous Genes via an Ecdysone Receptor Complex
申请人:HORMANN Robert Eugene
公开号:US20120116090A1
公开(公告)日:2012-05-10
The present invention provides diacylhydrazine ligands and chiral diacylhydrazine ligands for use with ecdysone receptor-based inducible gene expression systems. Thus, the present invention is useful for applications such as gene therapy, large scale production of proteins and antibodies, cell-based screening assays, functional genomics, proteomics, metabolomics, and regulation of traits in transgenic organisms, where control of gene expression levels is desirable. An advantage of the present invention is that it provides a means to regulate gene expression and to tailor expression levels to suit the user's requirements.
Chiral diacylhydrazine ligands for modulating the expression of exogenous genes via an ecdysone receptor complex
申请人:Hormann Robert Eugene
公开号:US20090163592A1
公开(公告)日:2009-06-25
The present invention provides diacylhydrazine ligands and chiral diacylhydrazine ligands for use with ecdysone receptor-based inducible gene expression systems. Thus, the present invention is useful for applications such as gene therapy, large scale production of proteins and antibodies, cell-based screening assays, functional genomics, proteomics, metabolomics, and regulation of traits in transgenic organisms, where control of gene expression levels is desirable. An advantage of the present invention is that it provides a means to regulate gene expression and to tailor expression levels to suit the user's requirements.
Synthesis of isotopically labeled R- or S-[13C, 2H] glycerols
申请人:Martinez A. Rodolfo
公开号:US20050027146A1
公开(公告)日:2005-02-03
The present invention is directed to asymmetric chiral labeled glycerols including at least one chiral atom, from one to two
13
C atoms and from zero to four deuterium atoms bonded directly to a carbon atom, e.g., (2S)[1,2-
13
C
2
]glycerol and (2R)[1,2-
13
C
2
]glycerol, and to the use of such chiral glycerols in the preparation of labeled amino acids.
Process for the asymmetric oxidation of organic compounds with peroxides in the presence of a chiral acid catalyst
申请人:Studiengesellschaft Kohle mbH
公开号:EP2615083A1
公开(公告)日:2013-07-17
The present invention relates to a process for the asymmetric oxidation of organic compounds, particularly metal-free, with peroxide compounds in the presence of a chiral Brønsted acid catalyst. In one detail, the present invention relates to a process for enantioselective sulfoxidation of thiocompounds with peroxide compounds in the presence of a chiral imidodiphosphate catalyst. In another detail, the present invention relates to a process for enantioselective sulfoxidation of thiocompounds with peroxide compounds in the presence of a chiral phosphoric acid catalyst.