Synthesis of Novel Chiral (Thio)ureas and Their Application as Organocatalysts and Ligands in Asymmetric Synthesis
作者:Marcos Hernández-Rodríguez、Claudia Gabriela Avila-Ortiz、Jorge M. del Campo、Delia Hernández-Romero、María J. Rosales-Hoz、Eusebio Juaristi
DOI:10.1071/ch08116
日期:——
The synthesis of novel chiral (thio)ureas 1–10 and 14–26 is described. These (thio)ureas incorporate chiral auxiliaries derived from (R)- or (S)-α-phenylethylamine, (R)-phenylglycine, or (1R,2S)-ephedrine. The phenylethyl group in compounds 1–10 and 21–24 adopts a particular orientation in the molecular structure as a consequence of 1,3-allylic strain with the (thio)carbonyl group. Ureas 1–10 were