Practical Asymmetric Conjugate Alkynylation of Meldrum’s Acid-Derived Acceptors: Access to Chiral β-Alkynyl Acids
作者:Sheng Cui、Shawn D. Walker、Jacqueline C. S. Woo、Christopher J. Borths、Herschel Mukherjee、Maosheng J. Chen、Margaret M. Faul
DOI:10.1021/ja909105s
日期:2010.1.20
The enantioselective conjugate addition of alkynyl nucleophiles has been a long-standing challenge in synthetic chemistry. This paper describes a highly practical asymmetric conjugate alkynylation of Meldrum's acid-derived acceptors using cinchonidine (<$100/kg) as the chiral mediator. The process provides practical access to chiral beta-alkynyl acids. Noteworthy attributes of the method are its broad
炔基亲核试剂的对映选择性共轭加成一直是合成化学中长期存在的挑战。本文描述了使用辛可尼丁 (<$100/kg) 作为手性介质的 Meldrum 酸衍生受体的高度实用的不对称共轭炔基化。该过程提供了获得手性β-炔基酸的实际途径。该方法的值得注意的属性是其广泛的范围、高度的功能组兼容性和易于扩展。