Über die Umsetzungen einiger Enamine von β-Dicarbonyl-verbindungen mit unterphosphoriger Säure
作者:N. Kreutzkamp、C. Schimpfky、K. Storck
DOI:10.1002/ardp.19683010403
日期:——
Sekundäre Enamine von β‐Dicarbonylverbindungen lagern unterphosphorige Säure unter Bildung von α‐Amino‐γ‐oxo‐phosphonigsäuren (II) an. Da tertiäre Enamine nicht reagieren, verläuft die Addition wahrscheinlich über die tautomeren Ketimid‐Formen (Ib). Mit primären Enaminen führt die Umsetzung zu α, β‐ungesättigten Phosphonigsäuren.
A novel and efficient methodology for the synthesis of 1,2,3-trisubstituted pyrroles by one-pot two-step reaction has been developed. The iodocyclization of a series of β-enamino esters followed by dehydroiodination, led to the formation of corresponding pyrroles. This approach provides an easy access to a wide range of 1,2,3-trisubstituted pyrroles.
Design of a graphene oxide-SnO<sub>2</sub> nanocomposite with superior catalytic efficiency for the synthesis of β-enaminones and β-enaminoesters
作者:Aniket Kumar、Lipeeka Rout、Rajendra S. Dhaka、Saroj L. Samal、Priyabrat Dash
DOI:10.1039/c5ra03363b
日期:——
A graphene–SnO2 nanocomposite has been synthesized by a solvothermal method, which is a more effective and less time-consuming catalyst for the synthesis of β-enaminones and β-enaminoesters.
Novel production of quinol-2(1H)-one derivatives from quinol-4(1H)-one derivatives
作者:Theodorus van Es、Benjamin Staskun
DOI:10.1039/a607385i
日期:——
Certain
1-alkyl-4-ethylimino-1,4-dihydro-2-methylquinoline-3-carboxylates
transform in alkaline solution to give a variety of
1-alkylquinol-2(1H)-one derivatives by competitive C-2 attack by
hydroxide followed by rearrangement.