A palladium NNC-pincer complex: an efficient catalyst for allylic arylation at parts per billion levels
作者:Go Hamasaka、Fumie Sakurai、Yasuhiro Uozumi
DOI:10.1039/c4cc09726b
日期:——
Allylic arylation of allylic acetates by sodium tetraarylborates in the presence of ppb to ppm (molar) loadings of a palladium NNC-pincer complex catalyst in methanol at 50 °C gave the corresponding arylated products in excellent yields.
Organic anions. Part 1. Equilibration of 1,3-diarylpropenes
作者:Richard J. Bushby、Gerald J. Ferber
DOI:10.1039/p29760001683
日期:——
A number of 1,3-diarylpropenes, potential precursors of the allylic anions (I). have been synthesised, and the base catalysed equilibration between the double bond isomers (II) and (III) has been investigated. The equilibrium constants correlate satisfactorily with the substituent constant σ. N.m.r. shift reagents aided spectroscopic analysis of certain mixtures.
substituted Hantzsch esters as the alkyl source under xenon lamp irradiation is developed. The reaction proceeds at room temperature and affords the corresponding products in moderate to excellent yields. The oxidant di-t-butylperoxide serves as an efficient radical initiator under irradiation of a Xenon lamp, initiating alkyl radicals from the 4-alkyl substituted Hantzsch esters.