作者:Tetsuya Tsujihara、Sayaka Endo、Tsunayoshi Takehara、Takeyuki Suzuki、Satoru Tamura、Tomikazu Kawano
DOI:10.1016/j.tetlet.2018.05.035
日期:2018.6
The synthesis of helically chiral [6]helicene-based sulfonic acid and sulfonamide from enantiomerically pure 1-acetylthio-5,6,9,10-tetrahydro[6]helicene is reported. The first helically chiral disulfonimides were developed as a synthetic application of [6]helicene-based sulfonamide. This new class of organocatalysts was tested in an asymmetric Mukaiyama aldol reaction to obtain up to quantitative yields
报道了从对映体纯的1-乙酰硫基5,6,9,10-四氢[6]]烯合成螺旋手性[6] hel烯基磺酸和磺酰胺。最初的螺旋手性二磺酰亚胺是作为[6]螺旋烯基磺酰胺的合成应用而开发的。在不对称的Mukaiyama aldol反应中测试了这类新的有机催化剂,以获得高达定量的收率和高达24%的对映选择性。