通过可见光光催化双碳-碳键断裂和多碳-氢键氧化,独特地进行了伯胺的无金属好氧氧化。通过使用具有18 W CFL的二恶烷,可以控制伯胺的好氧氧化,以提供酸;通过使用具有8 W绿色LED的DMF,可以分别控制内酯的内酯。在控制实验的基础上,提出了一个合理的机制。该观察结果为脂肪族伯胺的好氧氧化中的碎片化提供了直接证据。
Aryl Boronic Acid Catalysed Dehydrative Substitution of Benzylic Alcohols for C−O Bond Formation
作者:Susana Estopiñá‐Durán、Liam J. Donnelly、Euan B. Mclean、Bryony M. Hockin、Alexandra M. Z. Slawin、James E. Taylor
DOI:10.1002/chem.201806057
日期:2019.3.12
substitution of benzylicalcohols with a second alcohol to form new C−Obonds. This method has been applied to the intermolecular substitution of benzylicalcohols to form symmetrical ethers, intramolecular cyclisations of diols to form aryl‐substituted tetrahydrofuran and tetrahydropyran derivatives, and intermolecular crossed‐etherification reactions between two different alcohols. Mechanistic control
A novel enantioselectivebromolactonization of α,β-unsaturated ketones using bifunctional amino-urea catalysts has been developed. The scope of the reaction is evidenced by 23 examples of halolactones bearing various functionalities with up to 99% yield and 99:1 er. Unlike typical urea catalysts that require electron-deficient substituents to enhance the hydrogen bond strength, it is interesting to
[EN] NEW CCR2 RECEPTOR ANTAGONISTS AND USES THEREOF<br/>[FR] NOUVEAUX ANTAGONISTES DU RÉCEPTEUR CCR2 ET LEURS UTILISATIONS
申请人:BOEHRINGER INGELHEIM INT
公开号:WO2011073154A1
公开(公告)日:2011-06-23
The present invention relates to novel antagonists for CCR2 (CC chemokine receptor 2) of Formula (I) and their use for providing medicaments for treating conditions and diseases, especially pulmonary diseases like asthma and COPD.
The present invention relates to novel antagonists for CCR2 (CC chemokine receptor 2) and their use for providing medicaments for treating conditions and diseases, especially pulmonary diseases like asthma and COPD.
Enantioselective Organocatalyzed Bromolactonizations: Applications in Natural Product Synthesis
作者:Marius Aursnes、Jørn E. Tungen、Trond V. Hansen
DOI:10.1021/acs.joc.6b01375
日期:2016.9.16
The best catalyst enabled the cyclization of several 5-arylhex-5-enoic acids into the corresponding bromolactones with up to 96% ee and in high to excellent chemical yields. The reported catalysts are prepared in a straightforward manner in two steps from dimethyl squarate. The utility of the developed protocol was demonstrated in highly enantioselective syntheses of the sesquiterpenoids (−)-gossoronol