Abstract:Polyureas have widespread applications due to their unique material properties. Due to the toxicity of isocyanates, sus-tainable isocyanate-free routes to prepare polyureas is a field of active research. Current routes to isocyanate-free poly-ureas focus on constructing the urea moiety in the final polymerizing step. In this study we present a new isocyanate-free method to produce polyureas by Ru-catalyzed carbene insertion into the N‒H bonds of urea itself in combination with a series of bis-diazo compounds a… Show more
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