Novel Chiral Bifunctional L-Thiazoline-Thiourea Derivatives: Design and Application in EnantioselectiveMichael Reactions
作者:Qi Lai、Yang Li、Zhiyong Gong、Qingwen Liu、Chiyu Wei、Zhiguang Song
DOI:10.1002/chir.22540
日期:2015.12
Several novelchiralbifunctional L‐thiazoline‐thioureaderivatives were easily synthesized from commercially available L‐cysteine in high yield. These catalysts were subsequently applied to the enantioselective Michael addition of acetylacetone to β‐nitrostyrenes. The products with S configuration were obtained in 98% enantiomeric excess (ee) when the L‐thiazoline‐thioureaderivatives were used. A
Novel chiral bifunctional l-thiazoline-amide derivatives: design and application in the direct enantioselective aldol reactions
作者:Zhiyong Gong、Chiyu Wei、Ye Shi、Qingchuan Zheng、Zhiguang Song、Zaiqun Liu
DOI:10.1016/j.tet.2014.01.006
日期:2014.3
Several novelchiral bifunctional l-thiazoline-amide derivatives were simply synthesized from commercially available l-cysteine and l-proline in high yield. These catalysts were subsequently applied to the direct enantioselectivealdolreactions of various aldehydes, which are rarely reported in the literature. The products with anti configuration were obtained up to 97% ee and 99% dr when the l-thiazoline-amide