Asymmetric 1,3-Dipolar Cycloaddition of Azomethine Imines to Homoallylic Alcohols
作者:Katsuyoshi Tanaka、Tomomitsu Kato、Shuhei Fujinami、Yutaka Ukaji、Katsuhiko Inomata
DOI:10.1246/cl.2010.1036
日期:2010.10.5
The asymmetric 1,3-dipolar cycloaddition of azomethine imines to homoallylic alcohols was achieved by utilizing diisopropyl (R,R)-tartrate as a chiral auxiliary to give the corresponding optically active trans-pyrazolidines with excellent regio-, diastereo-, and enantioselectivities. The catalytic use of diisopropyl (R,R)-tartrate was also effective in the presence of MgBr 2 .
通过利用二异丙基 (R,R)-酒石酸作为手性助剂,实现了偶氮甲亚胺与高烯丙醇的不对称 1,3-偶极环加成反应,得到相应的具有优异区域选择性、非对映选择性和对映选择性的旋光反式吡唑烷。(R,R)-酒石酸二异丙酯的催化使用在MgBr 2 存在下也是有效的。