Practical Asymmetric Hydrogenation-Based Synthesis of a Class-Selective Histone Deacetylase Inhibitor
作者:Junli Chen、Tianqi Chen、Qiupeng Hu、Kurt Püntener、Yi Ren、Jin She、Zhengming Du、Michelangelo Scalone
DOI:10.1021/op500250b
日期:2014.12.19
inhibitor 1 are reported. In the first, eight-step entailing synthesis, the key transformations were a highly efficient [3 + 2] dipolar cycloaddition affording trans-rac-5 and its resolution. In the second, asymmetric approach, the key steps were a highly selective asymmetric hydrogenation to produce the cis-(S,S)-3,4-disubstituted pyrrolidine 18 followed by an amide formation with simultaneous chiral
报道了类选择性组蛋白脱乙酰基酶抑制剂1的两种合成。在第一,八步将会导致合成,关键变换是一个高效率的[3 + 2]偶极环加成,得到反式-外消旋- 5和其分辨率。在第二种不对称方法中,关键步骤是高度选择性的不对称氢化反应,以生成顺式-(S,S)-3,4-二取代的吡咯烷18,随后形成酰胺,同时使羧基立体中心手性转化,从而生成关键中间体的反式- (R,S)-3,4-二取代的吡咯烷19。总收率从拆分方法的约6%提高到对映选择性方法的约26%。