Organische Synthesen mit Übergangsmetall-Komplexen, 59[1] Cyclobutanimine aus Carbenchrom- oder -wolfram-Komplexen, Isocyaniden und Alkenen durch [2 + 2]-Cycloadditionen intermediärer Ketenimin-Komplexe; Liganden-Abspaltung mit Pyridin

✍ Scribed by Aumann, Rudolf ;Krüger, Carl ;Goddard, Richard

• Publisher: Wiley (John Wiley & Sons)
• Year: 1992
• Tongue: English
• Weight: 722 KB
• Volume: 125
• Category: Article
• ISSN: 0009-2940
• DOI: 10.1002/cber.19921250718

✦ Synopsis

Cyclobutanimines via carbene complexes / 10-Iminotricyclo[5.3.0.029]deca-3,5-dienes / (Cycloheptatrien-l-ylmethy1)carbene complexes of chromium and tungsten / Ketenimine complexes, [2 + 21 cycloadditions with alkenes / Ketene complexes, [2 + 21 cycloadditions Organic Syntheses via Transition Metal Complexes, 59[11. -Cyclobutanimines from Carbenechromium or -tungsten Complexes, Isocyanides. and Alkenes by [2 + 21-Cycloaddition Reactions of Ketenimine Complexes: Ligand Disengagement with Pyridine 10-Iminotricyclo[5.3.0.02*g]deca-3,5-diene complexes s ynlanti-4 are obtained in yields higher than 90% by the addition of isocyanides RNC 2 [R = c-CGHll (a), CH3 (b)] to (cycloheptatrien-1-ylmethy1)carbene complexes L,M = C(OEt)CH2(C7H7) 1 [L,M = Cr(C0)5 (a), W(CO)5 (b)]. The reactions involve an intermediate formation of ketenimine complexes L,M[RN = C = C(OEt)CH2C7H7] 3 by the insertion of 2 into the M = C bonds of 1. Complexes 3 isomerize to give the cyclo-