Diastereoselective Synthesis of Rotationally Restricted Chiral Phenylpyridines via Intramolecular Cascade Cyclization of <i>N</i>-Acyliminium Ions Containing <font>α</font>-Amino Acid Residues
作者:Jin-Ling Li、Hong-Wu Zhao、Xiao Qin、Jin Cui、Shi Su、Hai-Long Li、Yuan-Yuan Yue、Xiu-Qing Song
DOI:10.1080/00397911.2013.771403
日期:2013.12.2
Abstract A series of chiral phenylpyridines possessing a fused chiral bridge were synthesized diastereoselectively via cascade cyclizations, where N-acyliminium ions including an enantiopure α-amino acid residue were involved. The absolute configuration of the synthesized phenylpyridines was identified unambiguously by using nuclear Overhauser effect difference and circular dichroism (CD) measurements
摘要 通过级联环化非对映选择性地合成了一系列具有稠合手性桥的手性苯基吡啶,其中涉及包括对映纯α-氨基酸残基的N-酰基胺离子。在文献方法的基础上,通过使用核 Overhauser 效应差异和圆二色性 (CD) 测量,明确确定了合成苯基吡啶的绝对构型。[本文提供补充材料。访问出版商的 Synthetic Communications® 在线版,获取以下免费补充资源:完整的实验和光谱细节。] 图形摘要