Tricarbonyl(η6arene)chromium(0) complexes as chiral auxiliaries. Homochiralβ-lactams synthesis “via” [2+2] cycloaddition reaction.
1994; Elsevier BV; Volume: 5; Issue: 5 Linguagem: Inglês
10.1016/s0957-4166(00)86233-3
ISSN1362-511X
AutoresClara Baldoli, Paola Del Buttero, Emanuela Licandro, Stefano Maiorana, Antonio Papagni,
Tópico(s)Oxidative Organic Chemistry Reactions
ResumoA highly enantioselective synthesis of β-lactams "via" a [2+2] cycloaddition reaction of homochiral tricarbonyl [N-(2-methoxybenzylidene)aniline]chromium with ketenes is reported. Moreover the reaction of (+)-(1S)-tricarbonyl[4-methoxy-N-(2-methoxy cinnamylidene)aniline]chromium with acetoxy ketene gives the corresponding 4-styryl-β-lactam in good yield but with moderate stereoselection.
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