Asymmetric hydrolytic kinetic resolution with recyclable polymeric Co(<scp>iii</scp>)–salen complexes: a practical strategy in the preparation of (S)-metoprolol, (S)-toliprolol and (S)-alprenolol: computational rationale for enantioselectivity
作者:Tamal Roy、Sunirmal Barik、Manish Kumar、Rukhsana I. Kureshy、Bishwajit Ganguly、Noor-ul H. Khan、Sayed H. R. Abdi、Hari C. Bajaj
DOI:10.1039/c4cy00594e
日期:——
epoxide (up to 46% compared to 50% theoretical yield) along with high enantioselectivity (up to 99%) were obtained in most cases using catalyst 1. Further studies showed that catalyst 1 could retain its catalyticactivity for six cycles under the present reaction conditions without any significant loss in activity or enantioselectivity. To show the practical applicability of the above synthesized catalyst
Formal [3+2] Cycloaddition of Ketenes and Oxaziridines Catalyzed by Chiral Lewis Bases: Enantioselective Synthesis of Oxazolin-4-ones
作者:Pan-Lin Shao、Xiang-Yu Chen、Song Ye
DOI:10.1002/anie.201003532
日期:2010.11.2
Choose the right cat.: A highly enantioselectivesynthesis of oxazolin‐4‐ones by the formal [3+2] cycloaddition of ketenes and a racemic oxaziridines has been developed (see scheme; cat.=N‐heterocyclic carbenes for disubstituted ketenes or cinchonaalkaloids for monosubstituted ketenes, Ts=4‐toluenesulfonyl).
[EN] HYDROXAMATE COMPOUNDS AS ANTAGONISTS OF THE ADENOSINE A2A RECEPTOR<br/>[FR] COMPOSÉS HYDROXAMATE EN TANT QU'ANTAGONISTES DU RÉCEPTEUR A2A DE L'ADÉNOSINE
申请人:ADORX THERAPEUTICS LTD
公开号:WO2020260857A1
公开(公告)日:2020-12-30
The present invention relates to compounds of formula I shown below: (I) wherein R1, R2 and R3 are each as defined in the application. The present invention also relates to processes for the preparation of these compounds, to pharmaceutical compositions comprising them, and to their use in the treatment of diseases or conditions in which adenosine A2a receptor activity is implicated, such as, for example, cancer.
Enantioselective Synthesis of Terminal 1,2-Diols from Acyl Chlorides
作者:Panlin Shao、Litao Shen、Song Ye
DOI:10.1002/cjoc.201200697
日期:2012.9.27
Optically active terminal 1,2‐diols were prepared with high enantiopurity via the TMS‐quinidine‐catalyzed enantioselective cyclization of acyl chlorides and oxaziridine, followed by reductive ring‐opening of the cycloadducts.
A facile chemoenzymatic route to enantiomerically pure oxiranes: building blocks for biologically active compounds
作者:Ulrich Goergens、Manfred P. Schneider
DOI:10.1039/c39910001064
日期:——
The enantiomerically purebuildingblocks (R)-and (S)-1–4 were prepared both by enantioselective, enzymatic hydrolysis and by acyl transfer, and subsequently converted into the corresponding enantiomerically pure oxiranes (R)- and (S)-7 and 8.