Enantioselective CC Bond Formation to Sulfonylimines through Use of the 2-Pyridinesulfonyl Group as a Novel Stereocontroller
作者:Shuichi Nakamura、Hiroki Nakashima、Hideki Sugimoto、Hideaki Sano、Masataka Hattori、Norio Shibata、Takeshi Toru
DOI:10.1002/chem.200701425
日期:2008.2.27
Enantioselective C--C bond formation to 2-pyridinesulfonylimines afforded products with good enantioselectivity. Dynamic induction of chirality on the sulfur by coordination of a chiral Lewis acid to the pyridine nitrogen and one of the prochiral sulfonyl oxygens induces enantioselectivity. Since the 2-pyridinesulfonyl group can easily be removed after the reaction, it acts not only as an activating
对2-吡啶磺酰亚胺的对映选择性CC键形成提供具有良好对映选择性的产物。通过手性路易斯酸与吡啶氮和前手性磺酰基氧之一的配位,在硫上动态诱导手性,诱导对映选择性。由于2-吡啶磺酰基在反应后可以容易地除去,因此它不仅起活化基团的作用,而且起有效的立体调节剂的作用。