Regio- and Diastereoselective Synthesis of N-Aryl-5-alkylidene-5H-pyrrol-2-ones by a new Domino Reaction of 1,3-Dicarbonyl Dianions with Oxalic Acid-bis(imidoyl)chlorides
作者:Peter Langer、Manfred Döring
DOI:10.1055/s-2001-16772
日期:——
The reaction of dilithiated dicarbonyl compounds with oxalic acid-bis(imidoyl)chlorides results in regio- and stereoselective formation of 5-(alkylidene)-5H-pyrrol-2-ones.
Synthesis ofN-Aryl-5-alkylidene-2,5-dihydropyrrol-2-ones by“Cyclization/Dimroth Rearrangement” Reactions of 1,3-Dicarbonyl Dianions with Diimidoyl Dichlorides of Oxalic Acid
作者:Joachim T. Anders、Helmar Görls、Peter Langer
DOI:10.1002/ejoc.200300727
日期:2004.5
The reaction of dilithiated dicarbonyl compounds with oxaldiimidoyl dichlorides resulted in regio- and (E)/(Z)-diastereoselective formation of 5-alkylidene-3-arylamino-2,5-dihydropyrrol-2-ones. The products were formed by a domino “cyclization/Dimrothrearrangement” reaction. The mechanism and preparative scope of the cyclization was studied. The arylamino groups of the products were removed chemoselectively