Precise Supramolecular Control of Selectivity in the Rh-Catalyzed Hydroformylation of Terminal and Internal Alkenes
作者:Paweł Dydio、Remko J. Detz、Joost N. H. Reek
DOI:10.1021/ja4046235
日期:2013.7.24
DIM pocket of the ligand results in unprecedented selectivities in hydroformylation of terminal and internal alkenes functionalized with an anionic group. Remarkably, the selectivity controlling anionic group can be even 10 bonds away from the reactive double bond, demonstrating the potential of this supramolecular approach. Control experiments confirm the crucial role of the anion binding for the selectivity
The intramolecular acylation of some hex-, hept-, and oct-enoic acids
作者:M. F. Ansell、J. C. Emmett、R. V. Coombs
DOI:10.1039/j39680000217
日期:——
acids. Intramolecular acylation of these acids in the presence of trifluoroacetic anhydride is shown to be dependent on the structure and stereochemistry of the acids. The formation of cyclohept-2-enone from hept-6-enoic acid is reported. Concentrated sulphuric acid in acetic anhydride is shown to convert hex- and hept-5-enoic acid into phenyl and o-tolyl acetate, respectively. Some improved syntheses
[EN] NICOTINAMIDE DERIVATIVES<br/>[FR] DÉRIVÉS DE NICOTINAMIDE
申请人:PFIZER LTD
公开号:WO2009153720A1
公开(公告)日:2009-12-23
The present invention relates to compounds of the formula (I) and pharmaceutically acceptable salts and solvates thereof, wherein the substituents are defined herein, to compositions containing such compounds and to the uses of such compounds for the treatment of allergic and respiratory conditions.
Efficient and selective: Two lipophilic catalysts were used for Baeyer–Villiger (BV) oxidations to give lactones in high yields (see scheme). Cascadereactions involving this BV oxidation were used to selectively obtain either unsaturated carboxylic acids or hydroxylactones in high yields from β‐silyl cyclohexanones.
Spirocyclic Heterocycles Medicaments Containing Said Compounds, Use Thereof And Method For Their Production
申请人:Himmelsbach Frank
公开号:US20110046148A1
公开(公告)日:2011-02-24
The present invention relates to spirocyclic heterocycles of general formula (I)
the tautomers, the stereoisomers, the mixtures thereof and the salts thereof, particularly the physiologically acceptable salts thereof with inorganic or organic acids, which have valuable pharmacological properties, particularly an inhibitory effect on signal transduction mediated by tyrosine kinases, the use thereof for the treatment of diseases, particularly tumoral diseases as well as benign prostatic hyperplasia (BPH), diseases of the lungs and airways, and the preparation thereof.