New Prolyl Endopeptidase Inhibitors: <i>In Vitro</i> and <i>in Vivo</i> Activities of Azabicyclo[2.2.2]octane, Azabicyclo[2.2.1]heptane, and Perhydroindole Derivatives
作者:Bernard Portevin、Alain Benoist、Georges Rémond、Yolande Hervé、Michel Vincent、Jean Lepagnol、Guillaume De Nanteuil
DOI:10.1021/jm950858c
日期:1996.1.1
nM (compounds 24 and 25). Modulation of the side chain by replacement of the terminal phenyl ring by the dicyclopropyl moiety afforded derivatives 30 and 32 with improved potencies (IC50 between 10 and 20 nM). Furthermore, replacing the linear 4-phenylbutanoyl side chain by the (2-phenylcyclopropyl)carbonyl entity provided potent inhibitors with IC50 culminating at 0.9 nM on a rat cortex enzymatic preparation
Novel sulfonamide compounds useful in the treatment of conditions related to the production of beta-amyloid are described, as are routes to their preparation. The sulfonamide compounds are of the following structure, wherein R
1
-R
3
are defined herein. Also provided are pharmaceutical compositions containing these compounds and/or prodrugs of these compounds and a physiologically compatible carrier. These compounds are specifically useful for inhibiting beta amyloid production, and treating Alzheimer's Disease, amyloid angiopathy, cerebral amyloid angiopathy, systemic amyloidosis, hereditary cerebral hemorrhage with amyloidosis of the Dutch type, inclusion body myositis, mild cognitive impairment (MCI) and Down's syndrome.
3-Polyfluoroalkyl-substituted E-cinnamic acids: easy access via Perkin reaction
作者:Dmitri V Sevenard
DOI:10.1016/s0040-4039(03)01830-6
日期:2003.9
3-Polyfluoroalkyl-(E)-cinnamic acids being very useful building blocks were obtained by a simple and convenient one-step procedure. The Perkin type reaction of fluoroacyl-substituted arenes gives the titled compounds in good yields and excellent stereoselectivity independent on the electronic nature of substituents in the aromatic ring. In the case of fluoroalkyl–alkylketones only O-acylation occures
activated aromatic ketones (2,2,2-trifluoroacetophenone and its 4′-phenyl-derivative) with various condensing agents (acetic anhydride, propionic anhydride, phenylacetic acid/acetic anhydride) gives the title compounds in good or moderate yields, and high E-stereoselectivity. For some derivatives an appreciable amount of the Z isomer was also formed. Several of the resulting butenoic acids and their
Identification of an Esterase Isolated Using Metagenomic Technology which Displays an Unusual Substrate Scope and its Characterisation as an Enantioselective Biocatalyst
作者:Declan P. Gavin、Edel J. Murphy、Aoife M. Foley、Ignacio Abreu Castilla、F. Jerry Reen、David F. Woods、Stuart G. Collins、Fergal O'Gara、Anita R. Maguire
DOI:10.1002/adsc.201801691
日期:2019.6.6
Evaluation of an esterase annotated as 26D isolated from a marine metagenomic library is described. Esterase 26D was found to have a unique substratescope, including synthetic transformations which could not be readily effected in a synthetically useful manner using commercially available enzymes. Esterase 26D was more selective towards substrateswhich had larger, more sterically demanding substituents