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Direct synthesis of polyureas from the dehydrogenative coupling of diamines and methanol

Chemical Communications 2021 35 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 40 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Amit Kumar, D. P. ARMSTRONG, D. P. ARMSTRONG, Gavin Peters, Gavin Peters, Manjula Nagala, Manjula Nagala, Sally L. Shirran

Summary

Researchers developed a direct synthesis route for polyureas using dehydrogenative coupling of diamines and methanol catalysed by a ruthenium pincer complex, replacing toxic diisocyanate precursors with renewable, cheaper methanol and enabling synthesis of chiral and isotope-labelled polyurea variants.

We report here the first example of the direct synthesis of polyureas from the dehydrogenative coupling of diamines and methanol using a ruthenium pincer catalyst. The present methodology replaces the use of toxic diisocyanates, conventionally used for the production of polyureas, with methanol, which is renewable, less toxic, and cheaper, making the overall process safer and more sustainable. Further advantages of the current method have been demonstrated by the synthesis of a renewable, a chiral, and the first 13C-labelled polyurea.

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