Based on sequential organic transformations, that is, diimine formation, Staudinger [2 + 2] ketene–imine cycloaddition, and ring-closing metathesis (RCM) reactions, the synthesis with full structural identification including NMR and HRMS spectral data along with single X-ray diffraction analysis (for anti7b, anti8b, syn9a, and anti9b) of the first syn/anti bis-4-spiro-β-lactams-based azacrown ethers
基于顺序有机转化,即二
亚胺形成、施陶丁格 [2 + 2]
烯酮-
亚胺环加成和闭环复分解 (RCM) 反应,合成具有完整的结构鉴定,包括 NMR 和 HRMS 光谱数据以及单个 X-报道了第一种基于顺/反双-4-螺-β-内
酰胺的
氮杂
冠醚(7a、b-9a、b )的射线衍射分析(针对抗7b、抗8b、顺9a和抗9b )。