溶剂分解反应中的结构效应。45. 碳正离子的碳 13 核磁共振研究。9. 随着 1,1-二芳基-1-乙基碳阳离子中电子需求的增加,阳离子碳化学位移的变化。电感局部 pi 极化效应在引起线性偏差方面的重要性
摘要:
Etude systematique des effets de substituants sur les carbocations aryl。在观察 dans 某些 cas une 偏差 par rapport a la linearite entre les deplacements chimiques du carbone cationique et la constante GC + et l'on suggere que de Telles 偏差 不存在极化 π localisee
Flow Chemistry Syntheses of Styrenes, Unsymmetrical Stilbenes and Branched Aldehydes
作者:Samuel L. Bourne、Matthew O'Brien、Sivarajan Kasinathan、Peter Koos、Päivi Tolstoy、Dennis X. Hu、Roderick W. Bates、Benjamin Martin、Berthold Schenkel、Steven V. Ley
DOI:10.1002/cctc.201200778
日期:2013.1
Two tandem flowchemistry processes have been developed. A single palladium‐catalysed Heck reaction with ethylene gas provides an efficient synthesis for functionalised styrenes. Through further elaboration the catalyst becomes multi‐functional and performs a second Heck reaction providing a single continuous process for the synthesis of unsymmetrical stilbenes. In addition, the continuous, rhodium‐catalysed
Pd-catalyzed oxidative cross-coupling of N-tosylhydrazones with arylboronic acids
作者:Xia Zhao、Jing Jing、Kui Lu、Yan Zhang、Jianbo Wang
DOI:10.1039/b925590g
日期:——
The Pd-catalyzed reaction of N-tosylhydrazones and arylboronic acids provides olefin derivatives. This oxidative cross-coupling is suggested to proceed through a migratory insertion process of a Pd carbene intermediate.