A new process for obtaining dibenzo[c,f][1,2,5]thiadiazepines (DBTDs) and their effects on GABAA receptors of guinea pig myenteric neurons are described. Synthesis of DBTD derivatives began with two commercial aromatic compounds. An azide group was obtained after two sequential reactions, and the central ring was closed via a nitrene to obtain the tricyclic sulfonamides (DBTDs). Whole-cell recordings
Transition-Metal-Free Tandem Cyclization/<i>N</i>-Arylation Reaction: A Method To Access Biaryl Sultam Derivatives via a Diradical Pathway
作者:Vijaykumar H. Thorat、Jen-Chieh Hsieh、Chien-Hong Cheng
DOI:10.1021/acs.orglett.0c02393
日期:2020.8.21
This reaction goes through the intramolecular homolytic cyclization to generate an N–H biaryl sultam intermediate, which enables aryne insertion to access diversely functionalized biaryl sultam derivatives with high yields. The mechanism study indicates that homolytic cyclization is executed by a diradical species, initiated from the thermaldecomposition of 1,2,3,4-benzothiatriazine-1,1-dioxide to release
A compound of formula (I): N-oxides, addition salts, quaternary amines metal complexes stereochemically isomeric forms and metabolites thereof, wherein A is CR1 or N; D is H, C1-C6alkyl, C2-C6alkenyl, C2-C6alkynyl or Q is C2-C6alkenyl, C2-Cealkynyl, aryl or heterocyclyl; W is H, Ci-Cealkyl, C2-C6alkenyl, haloC1-C3alkyl, hydroxyC1-C3alkyl, C3-C6Cy cloalkyl, aryl or heterocyclyl; one of X' and X" is H or CH3, the other is C1-C3alkyl, F, OH, NRaRb, CF3 or N3; or X' and X" are both F; Y is a bond, CH2, NRa, O, CH2CH2, CH2NRa, CH2O or S(=O)r; Z is O, S(=O)r or NRa; the other variables are as defined in the specification. The compounds of the invention are inhibitors of BACE and are among other things useful for the treatment and/or prevention of conditions associated with BACE activity such as Alzheimer's disease.
P2′-truncated BACE-1 inhibitors with a novel hydroxethylene-like core
作者:Jenny Adrian Meredith、Catarina Björklund、Hans Adolfsson、Katarina Jansson、Anders Hallberg、Åsa Rosenquist、Bertil Samuelsson
DOI:10.1016/j.ejmech.2009.10.041
日期:2010.2
Highly potent BACE-1 protease inhibitors derived from a novel hydroxyethylene-like core structure were recently developed by our group using X-ray crystal structure data and molecular modelling. In a continuation of this work guided by molecular modelling we have explored a truncated core motif where the P2' amide group is replaced by an ether linkage resulting in a set of alkoxy, aryloxy and alkylaryl groups, with the overall aim to reduce molecular weight and the number of amide bonds to increase permeability and bestow the inhibitors with drug-like features. The most potent of these inhibitors displayed a BACE-I IC50 value of 140 nM. The synthesis of these BACE-I inhibitors utilizes readily available starting materials, furnishing the target compounds in good overall yields. (C) 2009 Elsevier Masson SAS. All rights reserved.
NOVEL ALKYLAMINO DERIVATIVES AS SIGMA 2 SELECTIVE LIGANDS