Electronic spectra of .alpha.,.beta.-unsaturated carbonyl compounds. I. An evaluation of increments characteristic of changes in configuration (cis/trans) and conformation (s-cis/s-trans) based on direct observation of the isomerization of enamino aldehydes and ketones
Conjugate Addition of 3-Buytn-2-one to Anilines in Ethanol: Alkene Geometric Insights through In Situ FTIR Monitoring
作者:David R. Chisholm、Roy Valentine、Ehmke Pohl、Andrew Whiting
DOI:10.1021/acs.joc.6b01110
日期:2016.9.2
A convenient, mild and effective conjugateaddition of 3-butyn-2-one to a variety of anilines in ethanol is reported. The reaction was monitored and characterized through in situ FTIR, and the dynamics of the facile E/Z alkene geometry interconversion of the resultant aniline-derived enaminones was explored through NMR, FTIR and X-ray crystallography. A straightforward purification protocol that employs
Electronic spectra of .alpha.,.beta.-unsaturated carbonyl compounds. I. An evaluation of increments characteristic of changes in configuration (cis/trans) and conformation (s-cis/s-trans) based on direct observation of the isomerization of enamino aldehydes and ketones
作者:Janusz Dabrowski、Krystyna Kamienska-Trela
DOI:10.1021/ja00426a026
日期:1976.5
1-Amino-3-siloxy-1,3-butadienes: Highly Reactive Dienes for the Diels−Alder Reaction
作者:Sergey A. Kozmin、Jacob M. Janey、Viresh H. Rawal
DOI:10.1021/jo981563k
日期:1999.4.1
heteroatom-containing dienes with several useful properties. These dienes can be prepared efficiently by deprotonation of readily available vinylogous amides with potassium hexamethylsilazide, followed by silylation of the corresponding potassium enolates. This protocol has been found to be quite general for the preparation of various dienes containing different silyl and amino groups. Amino siloxy dienes readily