Synthesis of a New N-Diaminophosphoryl-N′-[(2S)-2-pyrrolidinylmethyl]thiourea as a Chiral Organocatalyst for the Stereoselective Michael Addition of Cyclohexanone to Nitrostyrenes and Chalcones - Application in Cascade Processes for the Synthesis of Polyc
作者:Carlos Cruz-Hernández、Eduardo Martínez-Martínez、Perla E. Hernández-González、Eusebio Juaristi
DOI:10.1002/ejoc.201801339
日期:2018.12.31
novel chiralthiourea containing a segment of privileged (2S)‐2‐pyrrolidinylmetan‐amine as well as a hydrophobic phosphoramide framework is described. The new organocatalyst exhibited good performance in asymmetricMichaeladditions, in a variety of systems including the formal [3+3] cyclization of cyclohexanone with arylidenepyruvates through a cascade process, which involves the asymmetric Michael
A chiral benzoylthiourea–pyrrolidine catalyst for the highly enantioselective Michael addition of ketones to chalcones
作者:Shu-rong Ban、Xi-xia Zhu、Zhi-ping Zhang、Qing-shan Li
DOI:10.1016/j.bmcl.2014.04.005
日期:2014.6
A benzoylthiourea–pyrrolidine catalyst was developed for the asymmetric Michaeladdition of ketones to chalcones. The corresponding products were obtained in high yields with high level of diastereoselectivities (up to 99:1 dr) and high level of enantioselectivities (up to 94% ee) under mild conditions.