Brand, Jonathan P.Osuna-Siles, José IgnacioWaser, Jérôme2010-04-052010-04-052010-04-05201010.1055/s-0029-1219543https://infoscience.epfl.ch/handle/20.500.14299/49127WOS:000275848800007The rapid and modular synthesis of the first bifunctional N-heterocyclic carbenes bearing a (thio)urea moiety as H-bond donor group was reported. Different analogues could be accessed in seven steps from cheap (S)-pyroglutamic acid in good overall yields (14-30%). The synthesized carbenes were active catalysts in the benzoin reaction.umpolungasymmetric catalysiscarbeneshomogeneous catalysischiral pooltext::journal::journal article::research article