135220-15-4Relevant articles and documents
Synthesis of a library of imidazolin-4-ones using poly(ethylene glycol) as soluble support
Li, Hong-Xia,Xie, Chang,Ding, Ming-Wu,Liu, Zu-Ming,Yang, Guang-Fu
, p. 2280 - 2282 (2007)
A library of imidazolin-4-ones has been synthesized using poly(ethylene glycol) (PEG) as soluble polymer support. The imidazolin-4-ones 6 or 7 were synthesized effectively by reaction of primary amine with PEG-supported carbodiimides 4, which were obtaine
THE FORMATION OF PYRAZINES FROM N-β-KETOIMINOTRIPHENYLPHOSPHORANES; IMINOPHOSPHORANE-MEDIATED SYNTHESES OF 2,2,4,4-TETRAPHENYL-N,N'-BIS(2-PENTANE-3-ON)-CYCLOBUTANE-1,3-DIIMINE; 1,3,4-OXADIAZOLES; 2-AMINO-3,5-DIHYDROIMIDAZOL-4-ONES; AND 2-DIPHENYLMETHYL-1,5-DIHYDROIMIDAZOL-4-ONE
Froeyen, Paul
, p. 283 - 293 (2007/10/02)
The aza-Wittig reaction has been applied to the synthesis of the unstable N-β-keto ketenimine (18), which dimerize spontaneously, forming the very sterically hindered 2,2,4,4-tetraphenyl-N,N'-bis (2-pentane-3-on)-cyclobutane-1,3-diimine (21).Iminophosphoranes (33) and (38) are used for the preparation of some novel 1,5 and 3,5-dihydroimidazol-4-ones (36), (41a-b), (42).N-acylamino iminotriphenylphosphoranes (2a-d) are applied for the syntheses of a series of 1,3,4-oxadiazoles (32).The mechanism of the decomposition of the unstable N-β-keto iminotriphenylphosphoranes (1) into pyrazines and triphenylphosphine oxide has been investigated.Key words: Iminophosphoranes; β-keto carbodiimides; N-β-keto ketenimines; heterocycles.
TAUTOMERISM AND METHYLATION OF 2-IMINO-4-IMIDAZOLIDINONES
Ramsh, S. M.,Zheltonog, N. G.,Khrabrova, E. S.
, p. 52 - 55 (2007/10/02)
5-Benzylidenecreatinine and 2'-phenylglycocyamidine exist in DMSO-D6 in the imino form.In basic medium, the two compounds exhibit a dual reactivity with respect to methylating agents, forming N(2')- and N(3)-methyl derivatives.
HETEROGENEOUS METHYLATION OF THE SODIUM SALT OF 2-PHENYLIMINO-4-IMIDAZOLIDINONE BY DIMETHYL SULFATE IN ACETONITRILE
Ramsh, S. M.,Khrabrova, E. S.,Zheltonog, N. G.
, p. 767 - 772 (2007/10/02)
The sodium salt of 2-phenylimino-4-imidazolidinone, which exists in acetonitrile in the form of high-molecular agglomerates of spherical form 30-200 nm in diameter, reacts with dimethyl sulfate to form the isomeric exo- and endo-methylation products.Analysis of the kinetic parameters of nucleophilic substitution shows that it takes place on the surface of the agglomerates, i.e., is heterogeneous.