Ruthenium-catalyzed C–H allylation of arenes with allylic amines
作者:Rui Yan、Zhong-Xia Wang
DOI:10.1039/c8ob00723c
日期:——
Ru-catalyzed pyridyl-directed C–H allylation of arenes with allylicamines has been developed. This reaction was carried out in the presence of 5 mol% of [Ru(p-cymene)Cl2]2 and 0.5 equiv. of AgOAc in CF3CH2OH at 75 °C, affording the allylated products of arenes in moderate to excellent yields. The method exhibits a wide scope of allylicamines and arenes and shows a good compatibility of functional groups
Catalyst-Free [2,3]-Sigmatropic Rearrangement Reactions of Photochemically Generated Ammonium Ylides
作者:Fang Li、Feifei He、Rene M. Koenigs
DOI:10.1055/s-0037-1610732
日期:2019.12
rearrangement reaction of ammoniumylides furnishes valuable α,α-disubstituted amino esters. In this work, we describe the visible-light photolysis reaction of aryldiazoacetates in the presence of tertiary amines that react via a free ammoniumylide in a sigmatropic rearrangement reaction to provide amino esters in moderate to very good yields (33 examples, up to 97% yield). The rearrangement reaction of ammonium
possess 3-allyl and 3-amino simultaneously, was first achieved by employing an intermolecular [2,3]-sigmatropic rearrangementreaction between diazooxindoles and tertiary allylic amines. Utilizing readily available allylamines as the nitrogen and allyl source concurrently, a wide range of bio-active 3-allyl-3-(amino)oxindoles were obtained in excellent yields under very mild reaction conditions; meanwhile