14987-96-3Relevant articles and documents
Reaction between triphenylphosphine and aromatic amines in the presence of diethyl azodicarboxylate: An efficient synthesis of aryliminophosphoranes under neutral and mild conditions
Adib, Mehdi,Sheikhi, Ehsan,Deljoush, Azadeh
experimental part, p. 4137 - 4140 (2011/06/24)
An efficient synthesis of aryliminophosphoranes is described. A mixture of an aromatic amine, diethyl azodicarboxylate and triphenylphosphine undergo a Mitsonobu type reaction at ambient temperature in dry dichloromethane to afford aryliminophosphoranes in excellent yields.
Vinyltriphenylphosphonium salt mediated serendipitous synthesis of aryliminophosphoranes
Yavari, Issa,Adib, Mehdi,Hojabri, Leila
, p. 7213 - 7219 (2007/10/03)
Crystalline phosphorus ylides are obtained in excellent yields from the 1:1:1 addition reaction between triphenylphosphine, dimethyl acetylenedicarboxylate and aromatic amines, such as aniline, 1-naphthylamine, p-toluidine, 4-bromoaniline, 4-nitroaniline, 4-acetylaniline, 2-aminopyridine, or 2-amino-5-bromopyridine. These stabilized phosphoranes undergo a smooth intramolecular reaction in boiling p-xylene or toluene to produce aryliminophosphoranes in excellent yields.
Stereoisomerization of Ketene Imines
Lambrecht, Johanna,Gambke, Brigitte,Seyerl, Joachim von,Huttner, Gottfried,Kollmannsberger-von Nell, Georg,et al.
, p. 3751 - 3771 (2007/10/02)
Barriers to racemization in solution of the ketene imines 1a - y and X-ray structures of the ketene imines 1s and z are described.Similar to allenes all ketene imines have dihedral angles of 90 deg between the C- and N-substituents.The barriers to racemization range from 30 to 63 kJmol-1 and are lowered by electron attracting substituents on C and N.The barriers of m- and p-substituted N-arylketene imines give a linear Hammett correlation with ?- constants.N-Arylketene imines racemize through inversion at nitrogen and simultaneous rotation of the aryl group around the N - aryl bond.