Immobilization of Rhodium Complexes at Thiolate Monolayers on Gold Surfaces: Catalytic and Structural Studies
摘要:
Chiral rhodium-diphosphine complexes have been incorporated into self-assembled thiolate monolayers (SAMS) on gold colloids. Catalysts of this type are of interest because they combine properties of homogeneous and heterogeneous systems. In addition, it should be possible to influence the catalytic properties of the metal center by the neighboring thiolate molecules. Colloids with a diameter of ca. 3 nm, coated with a mixed monolayer of n-octanethiolates and thiolates with chiral rhodium-PYRPHOS end groups, were studied as hydrogenation catalysts. With methyl a-acetamido-cinnamate as substrate, virtually the same enantioselectivities (up to 93% ee) and full conversion were obtained as with the corresponding homogeneous [Rh(COD)(PYRPHOS)]BArF catalyst. The colloids were easily recovered by filtration and reused as catalysts three times without loss of enantioselectivity. STM studies of analogous SAMS on Au(111) gave a detailed picture of the structure and dynamics of mixed monolayers of this type. The STM images showed that the catalyst-bearing thiolates are distributed statistically on the surface and that the ordered structure of the n-octanethiolate SAM can be retained during incorporation of the catalyst-bearing thiols using the place-exchange methodology.
A drug conjugate is provided herein. The conjugate comprises a protein based recognition-molecule (PBRM) and a polymeric carrier substituted with one or more -LD-D, the protein based recognition-molecule being connected to the polymeric carrier by LP. Each occurrence of D is independently a therapeutic agent having a molecular weight ≦5 kDa. LD and LP are linkers connecting the therapeutic agent and PBRM to the polymeric carrier respectively. Also disclosed are polymeric scaffolds useful for conjugating with a PBRM to form a polymer-drug-PBRM conjugate described herein, compositions comprising the conjugates, methods of their preparation, and methods of treating various disorders with the conjugates or their compositions.
NOVEL DRUG DISCOVERY TARGET AND MEDICINE ACTING ON THE SAME
申请人:Reverse Proteomics Research Institute Co., Ltd
公开号:EP1754492A1
公开(公告)日:2007-02-21
The present invention provides a pharmaceutical composition comprising as an active ingredient a compound that specifically binds to MFP-2 or a functional fragment thereof and a screening method for the compound; the compound and a pharmaceutical composition comprising the same are highly useful as anti-inflammatory agents and anti-allergic agents.
[EN] HETEROCYCLIC-DITHIOL CLICK CHEMISTRY<br/>[FR] CHIMIE CLICK DE DITHIOL HÉTÉROCYCLIQUE
申请人:UNIV NORTHEASTERN
公开号:WO2019014311A1
公开(公告)日:2019-01-17
Disclosed are polymers, methods of making polymers, and compositions, focused on cross-linking heterocycles comprising a moiety of Formula I with thiols and thiolates.
Electrochemical Assay for the Detection of Enzymes
申请人:Bertin Paul A.
公开号:US20100003710A1
公开(公告)日:2010-01-07
The invention relates to novel compositions and methods for the detection of enzymes using the nuclear reorganization energy, λ, of an electron transfer process.
A drug conjugate is provided herein. The conjugate comprises a protein based recognition-molecule (PBRM) and a polymeric carrier substituted with one or more -L
D
-D, the protein based recognition-molecule being connected to the polymeric carrier by L
P
. Each occurrence of D is independently a therapeutic agent having a molecular weight ≦5 kDa. L
D
and L
P
are linkers connecting the therapeutic agent and PBRM to the polymeric carrier respectively. Also disclosed are polymeric scaffolds useful for conjugating with a PBRM to form a polymer-drug-PBRM conjugate described herein, compositions comprising the conjugates, methods of their preparation, and methods of treating various disorders with the conjugates or their compositions.