Copper-Catalyzed Asymmetric Ring-Opening Reaction of Oxabenzonorbornadienes with Grignard and Aluminum Reagents
作者:Alexandre Alexakis、Renaud Millet、Ludovic Gremaud、Tania Bernardez、Laëtitia Palais
DOI:10.1055/s-0029-1216838
日期:2009.6
A highly enantioselective method for the copper-catalyzed desymmetrization of oxabenzonorbornadienes with aluminum reagents and SimplePhos as chiral ligand has been developed. The same reaction with Grignard reagents is also reported. A wide range of alkyl chains have been used with moderate to high enantioselectivity and high trans selectivity. The transfer of a methyl group is also reported with
已经开发了一种高度对映选择性的方法,该方法通过铝试剂和SimplePhos作为手性配体,对铜进行草酰苯并降冰片二烯的脱对称反应。还报道了与格氏试剂的相同反应。广泛使用的烷基链具有中等至高对映选择性和高反式选择性。还报道了甲基的转移,其对映体和非对映体过量,并且对于不同的底物,产率很高。最后,我们已经能够执行第一跨与芳基oxabenzonorbornadienes的对映选择性desymmetrization。 铜催化-不对称转化-格氏试剂-铝试剂-SimplePhos