Mechanism of insertion of carbodiimides into the Zr-C bonds of zirconaaziridines. Formation of alpha-amino amidines

Authors
Tunge, JA Czerwinski, CJ Gately, DA Norton, JR
Citation
Ja. Tunge et al., Mechanism of insertion of carbodiimides into the Zr-C bonds of zirconaaziridines. Formation of alpha-amino amidines, ORGANOMETAL, 20(2), 2001, pp. 254-260
Citations number
53
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
ORGANOMETALLICS
ISSN journal
02767333 → ACNP
Volume
20
Issue
2
Year of publication
2001
Pages
254 - 260
Database
ISI
SICI code
0276-7333(20010122)20:2<254:MOIOCI>2.0.ZU;2-#
Abstract
Treatment of zirconaaziridines Cp2Zr-eta (2)- [N(R-1)CH(R-2)](THF) with car bodiimides results in the insertion of the carbodiimide into the Zr-C bonds . The insertion of bis(trimethylsilyl)carbodiimide is reversible, which bec omes significant at high THF concentrations. Kinetic data indicate that the THF ligand must dissociate prior to carbodiimide insertion. Protic cleavag e of the organic fragment from zirconium results in formation of alpha -ami no amidines.