Serine-<i>cis</i>-proline and Serine-<i>trans</i>-proline Isosteres: Stereoselective Synthesis of (<i>Z</i>)- and (<i>E</i>)-Alkene Mimics by Still−Wittig and Ireland−Claisen Rearrangements
作者:Xiaodong J. Wang、Scott A. Hart、Bailing Xu、Matthew D. Mason、John R. Goodell、Felicia A. Etzkorn
DOI:10.1021/jo026663b
日期:2003.3.1
cycle. The cis mimic, the (Z)-alkene isomer, was formed through the use of a Still-Wittig [2,3]-sigmatropic rearrangement, while the trans mimic, the (E)-alkene, was synthesized through the use of an Ireland-Claisen [3,3]-sigmatropic rearrangement. Starting from N-Boc-Ser(OBn)-N(OMe)Me, both mimics were synthesized in Boc-protected form suitable for peptide synthesis with an overall yield of 20% in 10
设计并立体选择性合成了两个新的Ser-cis-Pro和Ser-trans-Pro酰胺同分异构体,以掺入磷酸化依赖性肽基脯氨酰异构酶Pin1(细胞周期的重要调节剂)的潜在抑制剂中。顺式模拟物(Z)-烯烃异构体是通过使用Still-Wittig [2,3]-σ重排而形成的,而反式模拟物(E)-烯烃则是通过使用爱尔兰-克莱森[3,3]-σ重排。从N-Boc-Ser(OBn)-N(OMe)Me开始,两种模拟物均以适合肽合成的Boc保护形式合成,其中顺式模拟物的10步总产率为20%,八步中的总产率为13%。为反式模仿。