Categories: Synthesis of N-Heterocycles >
Synthesis of imidazolidinones and related compounds
Related |
|
Recent Literature
An efficient, versatile and practical gram-scale preparation of
oxazolidinone, imidazolidinone and dioxolanone is achieved.
N. Alouane, A. Boutier, C. Baron, E. Vrancken, P. Mangeney, Synthesis, 2006, 860-864.
A nickel-catalyzed cycloaddition of aziridines with isocyanates proceeded
smoothly to give iminooxazolidine derivatives in good yields. A longer
reaction time allowed the isomerization of the iminooxazolidine to the
corresponding imidazolidinone derivatives.
T. Munegumi, I. Azumaya, T. Kato, H. Masu, S. Saito, Org. Lett.,
2006, 8, 379-382.
Imidazolidin-2-ones are prepared in two steps from readily available N-allylamines.
Addition of the amine starting materials to isocyanates affords N-allylureas,
which are converted to imidazolidin-2-ones with generation of two bonds and
up to two stereocenters in the presence of aryl bromides, a catalytic amount
of Pd2(dba)3/Xantphos and NaOtBu.
J. A. Fritz, J. S. Nakhla, J. P. Wolfe, Org. Lett.,
2006, 8, 2531-2534.
A wide variety of terminal olefins can be effectively diaminated at allylic and
homoallylic carbons via formal C-H activation in good yields with high
stereoselectivity using di-tert-butyldiaziridinone as nitrogen source and
Pd(PPh3)4 as catalyst.
H. Du, W. Yuan, B. Zhao, Y. Shi, J. Am. Chem. Soc., 2007,
129, 7496-7497.
A palladium-catalyzed intramolecular diamination reaction yields cyclic
ureas as direct products of an oxidative alkene transformation in the
presence of iodosobenzene diacetate as terminal oxidant.
J. Streuff, C. H. Hövelmann, M. Nieger, K. Muniz, J. Am. Chem. Soc.,
2005, 127, 14586-14587.
High-yielding reductive alkylation of electron-deficient o-haloarylamines
followed by treatment with inexpensive N-chlorosulfonyl isocyanate
afforded primary ureas in good overall yields. A Pd-catalyzed urea
cyclization reaction furnished imidazopyridinones and benzoimidazolones in
excellent yields.
M. McLaughlin, M. Palucki, I. W. Davies, Org. Lett.,
2006, 8, 3311-3314.
