Disclosed are reactive cyclic carbonates and ureas of formula (I) or (II), wherein R and X have the meaning indicated in the description. Said carbonates and ureas allow functional groups to be specifically introduced into biomolecules, polymers, and surfaces in mild conditions....http://www.google.com.au/patents/US7728069?utm_source=gb-gplus-sharePatent US7728069 - Reactive cyclic carbonates and ureas used for modifying biomolecules, polymers, and surfaces
