89953-16-2Relevant articles and documents
Metal Complexes of Cyanamides and their Alkylation to Cyanamidium Salts. A General Synthesis of Highly Substituted Ureas, Isoureas, and Guanidines
Jochims, Johannes C.,Abu-El-Halawa, Rajab,Zsolnai, Laszlo,Huttner, Gottfried
, p. 1161 - 1177 (2007/10/02)
The complexes 3a - p were prepared from disubstituted cyanamides and Lewis acids.According to a X-ray structural analysis, the antimony pentachloride complex 3a is neither a ? nor a ? complex ( CN-Sb 133 deg).The complexes 3 with SbCl5 and FeCl3 can be alkylated with tertiary alkyl chlorides, affording crystalline cyanamidium salts (5a - m) which were characterized by reactions with water, primary or secondary alcohols to give ureas (11) and uronium salts (8a - z), respectively.The guanidinium salts 9a - s were obtained with ammonia, primary and secondary amines.