作者:Franca M. Cordero、Maria Salvati、Carolina Vurchio、Armin de Meijere、Alberto Brandi
DOI:10.1021/jo9004684
日期:2009.6.5
induced thermal fragmentative rearrangement. With the use of enantiopure pyrroline N-oxides derived from easily available chiral pool molecules, β-homoprolines were formed with high stereocontrol. The incorporation of one of these new cyclic β-amino acids into a simple tripeptide was also evaluated. In particular, the sterically hindered nitrogen atom of the highly substituted pyrrolidine 30 was smoothly
1-(2-吡咯烷基)环丙烷羧酸(α-环丙基-β-脯氨酸)的制备方法是:将环硝酮与1,3-偶极环加成到双环亚丙基上,然后由三氟乙酸引起的热裂解重排。使用衍生自易于获得的手性库分子的对映体纯的吡咯啉N-氧化物,可形成具有高度立体控制的β-高脯氨酸。还评估了将这些新的环状β-氨基酸之一掺入简单的三肽中。特别地,通过中间形成混合酸酐,高度取代的吡咯烷30的位阻氮原子被平滑地酰化。