Development of an Asymmetric Trimethylenemethane Cycloaddition Reaction: Application in the Enantioselective Synthesis of Highly Substituted Carbocycles
作者:Barry M. Trost、Steven M. Silverman、James P. Stambuli
DOI:10.1021/ja207550t
日期:2011.12.7
azetidine structures, is discussed. The conditions developed to effect an asymmetric TMM reaction using 2-trimethylsilylmethyl allyl acetate were shown to be tolerant of a wide variety of alkene acceptors, providing the desired methylenecyclopentanes with high levels of enantioselectivity. The donor scope was also explored, and substituted systems were tolerated, including one bearing a nitrile moiety. These
Development of inhibitors to antagonize the activities of antiapoptoticBcl-2familyproteins is of particular interest in cancer chemotherapy. We discovered a quinazoline-2(1H)-thione derivative (DCBL55) as a new Bcl-xL, Bcl-2, and Mcl-1 inhibitor by virtual database screening. We systematically modified the structure of compound 1 by chemical synthesis. The interactions of the compounds with Bcl-xL
Selectivity in the Aerobic Dearomatization of Phenols: Total Synthesis of Dehydronornuciferine by Chemo- and Regioselective Oxidation
作者:Kenneth Virgel N. Esguerra、Jean-Philip Lumb
DOI:10.1002/anie.201710271
日期:2018.2.5
and highlight the advantages of confining oxygen activation and substrate oxidation to the catalyst's inner‐coordination sphere. This gives rise to predictable selectivity that we use for a concise synthesis of the aporphine dehydronornuciferine.
UV-light induced domino type reactions: synthesis and photophysical properties of unreported nitrogen ring junction quinazolines
作者:Jeyakannu Palaniraja、Selvaraj Mohana Roopan
DOI:10.1039/c5ra00229j
日期:——
An expedient method for the synthesis of 5,6-dihydrobenzo[h][1,2,4]triazolo[5,1-b]quinazolines by UV light has been developed.
已开发出一种利用紫外光合成5,6-二氢苯并[h][1,2,4]三唑[5,1-b]喹唑啉的方法。
Highly Enantioselective Iridium-Catalyzed Hydrogenation of Trisubstituted Olefins, α,β-Unsaturated Ketones and Imines with Chiral Benzylic Substituted P,N Ligands
作者:Wei-Jing Lu、Yun-Wei Chen、Xue-Long Hou
DOI:10.1002/adsc.200900618
日期:2010.1.4
The benzylic substituted P,N ligands, diphosphinobenzyloxazolines, showed their high catalytic activity as well as asymmetric induction in the iridium‐catalyzed asymmetric hydrogenation of unfunctionalized alkenes, α,β‐unsaturated esters, allyl alcohols, α,β‐unsaturated ketones, and imines, providing the corresponding chiral products in high ee with high conversion.