ofmann (Ber., 4, 246. 1871.) found that triethylphosphine served as a catalyst to cause the polymerization of phenyl isocyanate to a dimer which he designated as diphenyl diisocyanate. Staudinger ("Die Ketene", Enke, Stuttgart, 1912, p. 126.) regarded this product as a four atomic ring derivative. It has now been found that triethylphosphine polymerizes a number of substituted phenylisocyanates, such as λ- and β-naphthyl isocyanates, and p-xenyl isocyanate. These products which have more recently been listed as derivatives of uretedione, react with aliphatic amines to produce substituted biurets.
Proceedings of the Iowa Academy of Science
© Copyright 1942 by the Iowa Academy of Science, Inc.
Freyermuth, Harlan B. and Raiford, L. Chas.
"Formation and Properties of Some Uretediones,"
Proceedings of the Iowa Academy of Science, 49(1), 285-285.
Available at: https://scholarworks.uni.edu/pias/vol49/iss1/42