已开发出一种简单有效的方法,使用支持的试剂系统CuBr 2 / Al 2 O 3 -Na 2 CO 3 / Al 2 O 3在一个锅中由β-酮酸酯和二酮合成α-溴酸酯和酮,其中β-酮酸酯首先与CuBr 2 / Al 2 O 3反应,产物α-溴-β-酮酸酯与Na 2 CO 3 / Al 2 O 3反应以高产率得到最终产物α-溴酸酯。
[EN] NON-PEPTIDIC HETEROCYCLE-CONTAINING COMPOUNDS FOR THE TREATMENT OF ALZHEIMER'S DISEASE<br/>[FR] COMPOSÉS NON PÉPTIDIQUES CONTENANT DES HÉTÉROCYCLES POUR LE TRAITEMENT DE LA MALADIE D'ALZHEIMER
申请人:UNIV ALBERTA
公开号:WO2020215157A1
公开(公告)日:2020-10-29
The present disclosure provides non-peptidic heterocycle-containing amylin receptor antagonist compounds, compositions that include the subject compounds, methods for preparing and using the amylin receptor antagonists, and compositions containing the amylin receptor antagonists for treating, preventing, or ameliorating Alzheimer's disease. Aspects of the present disclosure include a method of inhibiting activity of an amylin receptor by administering to a subject in need thereof a therapeutically effective amount of an amylin receptor antagonist.
The biocatalytic stereoselective synthesis of lactams with two chiral centers by a dynamickineticresolution strategy is demonstrated. Five transaminases were examined for the transamination of chemically synthesized substituted γ‐ or δ‐keto esters. The application of (R)‐ and (S)‐selective enzymes led to the corresponding chiral amines with moderate to high diastereomeric ratios and excellent enantiomeric
Salzer et al., Chemische Berichte, 1948, vol. 81, p. 12,17
作者:Salzer et al.
DOI:——
日期:——
Coumarin-Based Inhibitors of Bacillus anthracis and Staphylococcus aureus Replicative DNA Helicase: Chemical Optimization, Biological Evaluation, and Antibacterial Activities
作者:Bing Li、Ramdas Pai、Ming Di、Daniel Aiello、Marjorie H. Barnes、Michelle M. Butler、Tommy F. Tashjian、Norton P. Peet、Terry L. Bowlin、Donald T. Moir
DOI:10.1021/jm300922h
日期:2012.12.27
The increasing prevalence of drug-resistant bacterial infections demands the development of new antibacterials that are not subject to existing mechanisms of resistance. Previously, we described coumarin-based inhibitors of an underexploited bacterial target, namely the replicative helicase. Here we report the synthesis and evaluation of optimized coumarin-based inhibitors with 9-18-fold increased potency against Staphylococcus aureus (Sa) and Bacillus anthracis (Ba) helicases. Compounds 20 and 22 provided the best potency, with IC50 values of 3 and 1 mu M, respectively, against the DNA duplex strand-unwinding activities of both B. anthracis and S. aureus helicases without affecting the single strand DNA-stimulated ATPase activity. Selectivity index (SI = CC50/MIC) values against S. aureus and B. anthracis for compound 20 were 33 and 66 and for compound 22 were 20 and 40, respectively. In addition, compounds 20 and 22 demonstrated potent antibacterial activity against multiple ciprofloxacin-resistant MRSA strains, with MIC values ranging between 0.5 and 4.2 mu g/mL.