A practical amine-free synthesis of symmetric ureas and thioureas by self-condensation of iso(thio)cyanates

1. Jiménez Blanco, J.L.
2. Saitz Barría, C.
3. Benito, J.M.
4. Ortiz Mellet, C.
5. Fuentes, J.
6. Santoyo-González, F.
7. García Fernández, J.M.