160060-61-7Relevant articles and documents
Preparation of -, -, and -Bicyclic Guanidines from C,C'-Bis(iminophosphoranes)
Molina, Pedro,Obon, Rosario,Conesa, Carlota,Arques, Antonio,Desamparados Velasco, M. de los,et al.
, p. 1641 - 1652 (2007/10/02)
A one-pot synthesis of -, -, and -rigid bicyclic guanidines (6, 8, 19, 21, 23) based on a bis(iminophosphorane)-mediated annulation strategy is reported.The crystal and molecular structure of the parent -bicyclic guanidine 8 has been established by X-ray diffraction.The crystallographically independent molecule forms dimers through a centre of symmetry by N-H***N hydrogen bonds.The molecule, and therefore the dimer, is statistically disordered in a 65/35 ratio.A statistical study of N-H***N hydrogen bonds of this kind of dimers has been carried out by using the Cambridge Structural Database. - Key Words: Bis(iminophosphoranes) / Guanidines, bicyclic / Aza Wittig reaction