Rh‐Catalyzed Asymmetric Hydrogenation of α,β‐ and β,β‐Disubstituted Unsaturated Boronate Esters
作者:Qiaozhi Yan、Xin Shen、Guofu Zi、Guohua Hou
DOI:10.1002/chem.202000703
日期:2020.5.12
A highlyenantioselectivehydrogenation of α,β-unsaturated boronate esters catalyzed by Rh-(S)-DTBM-Segphos complex has been developed. Both (Z)-α,β- and β,β-disubstituted substrates can be successfully hydrogenated to afford chiral boronates with excellent enantioselectivities, up to 98 % ee. Furthermore, the obtained chiral boronate esters, as important versatile synthetic intermediates are successfully
In the presence of 5 mol% Pd(OAc)2, 1 equiv. of norbornene, and K2CO3, the reaction of 4-iodo-2-quinolones with tertiary o-bromobenzylic alcohols produced the desired benzopyran-fused 2-quinolones in moderate to high yields. A Catellani-type mechanism involving vinylic C–H cleavage is proposed based on the results of control experiments and density functional theory calculations.
在5mol%Pd(OAc)2的存在下,1当量。降冰片烯和K 2 CO 3的作用下,4-碘-2-喹诺酮与叔邻溴苄醇的反应以中等至高产率产生了所需的苯并吡喃稠合的2-喹诺酮。基于控制实验和密度泛函理论计算的结果,提出了一种涉及乙烯基C–H裂解的Catellani型机理。
Boron-containing small molecules for controlling ectoparasites
申请人:Eli Lilly and Company
公开号:US08546357B2
公开(公告)日:2013-10-01
This invention provides novel compounds, methods of using the compounds, and pharmaceutical compositions containing the compounds.
这项发明提供了新化合物、使用这些化合物的方法以及包含这些化合物的药物组合物。
EP2782449A1
申请人:——
公开号:EP2782449A1
公开(公告)日:2014-10-01
ISOXAZOLINE DERIVATIVES USED IN THE CONTROL OF ECTOPARASITES