Electrochemical generation of chiral oxazolidin-2-ones anions: a new procedure for the highly diastereoselective conjugate addition to nitroalkenes
作者:Marta Feroci、Achille Inesi、Laura Palombi、Leucio Rossi
DOI:10.1016/s0957-4166(01)00385-8
日期:2001.9
A mild and efficient electrochemical alternative to classical base-catalyzed conjugate addition of nitrogen nucleophiles is reported here. The cleavage of the carbamic NH bond of Evans’ chiral auxiliaries can be very efficiently performed by electrolysis under galvanostatic control and the resulting naked anions used for highly diastereoselective conjugate addition to nitroalkenes. The degree of stereoselectivity
本文报道了氮亲核试剂经典碱催化共轭加成的温和有效的电化学替代方法。埃文斯手性助剂的氨基甲酸酯NH键的裂解可通过在恒电流控制下进行电解而非常有效地进行,所得裸阴离子可用于向硝基烯烃中高度非对映选择性的共轭物加成。立体选择性的程度显示取决于该基团在起始恶唑烷-2-酮的环C(4)处的空间位阻。