Iron-Catalyzed Regioselective Direct Arylation at the C-3 Position of <i>N</i>-Alkyl-2-pyridone
作者:Atanu Modak、Sujoy Rana、Debabrata Maiti
DOI:10.1021/jo502362k
日期:2015.1.2
A number of pharmaceutical compounds possess an arylated 2-pyridone moiety. The existing reports using expensive starting materials and/or superstoichiometric metal salts have prompted us to explore a possible user-friendly method for their synthesis. In this report, we demonstrate an easy-to-handle reaction condition with an iron catalyst for the exclusive generation of C-3-arylated pyridone via C–H
A palladium-catalyzedcarbonylative cyclization of benzylchlorides with o-nitrobenzaldehydes has been developed for the synthesis of 3-arylquinolin-2(1H)-ones. Mo(CO)6 played a dual role as both a CO surrogate and a reductant in this carbonylative transformation.
已经开发了钯催化的苄基氯与邻硝基苯甲醛的羰基化环化反应,用于合成 3-芳基喹啉-2(1 H )-酮。Mo(CO) 6在该羰基化转化中扮演着CO替代物和还原剂的双重角色。
The synthesis of benzofuroquinolines. I. Some benzofuro[2,3-<i>b</i>]quinoline and benzofuro[3,2-<i>c</i>]quinoline derivatives
Benzofuro[2,3-b]quinoline (Ia) and its 11-methyl derivative (Ib) were synthesized by demethylcyclization of 3-(o-methoxyphenyl)-1,2-dihydroquinolin-2-ones (VIa,b). Benzofuro[2,3-b]quinoline-11-carboxylic acid (Id) was synthesized by chlorination followed by the action of potassium hydroxide of a lactone (IX) prepared by demethyl-cyclization of 3-(o-methoxyphenyl)-2-oxo-1,2-dihydroquinoline-4-carboxylic
通过3-(邻甲氧基苯基)-1,2-二氢喹啉-2-酮(VIa,b)的脱甲基环化反应合成苯并呋喃[2,3- b ]喹啉(Ia)及其11-甲基衍生物(Ib)。苯并呋喃[2,3 - b ]喹啉-11-羧酸(Id)通过氯化反应,然后通过3-(邻甲氧基苯基)-2-的甲基环化反应制得的内酯(IX)的氢氧化钾作用合成氧代1,2-二氢喹啉-4-羧酸(VIII)。异构苯并呋喃[3,2-c]喹啉(Ha)及其6-甲基衍生物(IIb)是通过3-(o-甲氧基苯基)-1,4-二氢喹啉-4-酮(XIa,b)。通过与苯甲醛缩合,然后氧化,将两种甲基衍生物(Ib和IIb)都转化为羧酸(Id和IId)。由此获得的苯并呋喃喹啉(Ia,b,d和IIa,b)被氧化成相应的N-氧化物(IIIa,b,d和IVa,b)。
Iron-catalyzed synthesis of substituted 3-arylquinolin-2(1H)-ones via an intramolecular dehydrogenative coupling of amido-alcohols
作者:Léo Bettoni、Nicolas Joly、Inès Mendas、Matteo Maria Moscogiuri、Jean-François Lohier、Sylvain Gaillard、Albert Poater、Jean-Luc Renaud
DOI:10.1039/d4ob00649f
日期:——
Here we report an iron-complex-catalyzed synthesis of various mono- and di-substituted quinolin-2(1H)-ones achieved via the intramolecular acceptorless dehydrogenative cyclization of amido-alcohols. This approach for the synthesis of N-heterocycles has provided access to underdescribed disubstituted quinolinones and represents an alternative to the well-known palladium-catalyzed coupling reactions
在这里,我们报道了通过酰胺醇的分子内无受体脱氢环化实现的各种单取代和双取代的喹啉-2(1 H )-酮的铁络合物催化合成。这种合成 N-杂环的方法提供了获得未描述的二取代喹啉酮的途径,并且代表了众所周知的钯催化偶联反应的替代方案。