Diastereoselective copper-catalysed 1,4-addition of Grignard reagents to N-enoyl oxazolidinones
作者:Michal Drusan、Zuzana Galeštoková、Radovan Šebesta
DOI:10.1039/c3ra42024h
日期:——
Conjugate additions of organometallic reagents to α,β-unsaturated carboxylic acid derivatives give access to numerous β-substituted chiral building blocks. Chiral oxazolidinones serve as useful surrogates of carboxylic function in the asymmetric conjugate addition of Grignard reagents. N-Enoyl oxazolidinones undergo this 1,4-addition with a catalytic amount of copper salt and using either chiral or
将有机金属试剂共轭添加到α,β-不饱和羧酸衍生物中可以得到许多β-取代的手性结构单元。手性恶唑烷酮在格氏试剂的不对称共轭加成中可用作有用的羧基官能替代物。N-烯丙基恶唑烷酮与1,4-催化量的铜盐进行加成反应,并使用手性或非手性膦配体。特别地,手性二茂铁基膦烷恶唑啉被证明可用于实现高非对映选择性。以高收率和高非对映选择性(直至单一非对映异构体)获得所得的N-酰基恶唑烷酮。