Expeditious Routes to Polycyclic Molecular Frameworks via One-Pot, Two-Step Ugi Ring-Closing Sequences
作者:Christopher Hulme、Zhigang Xu、Fabio De Moliner、Alexandra Cappelli、Muhammed Ayaz
DOI:10.1055/s-0033-1340219
日期:——
Ugi condensation between ethyl glyoxylate, isonitriles, N -Boc-α-amino acids, and mono - N -Boc-protected diamines followed by a series of acid-promoted cyclization steps in a one-pot fashion is reported. This process allows for the assembly of complex polycyclic structures by means of just two simple synthetic operations and a single chromatographic purification in high overall yields. Of note, the
一个非常通用和强大的多组分反应方案,包括乙醛酸乙酯、异腈、N-Boc-α-氨基酸和单-N-Boc-保护的二胺之间的 Ugi 缩合,然后是一系列酸促进的环化步骤-锅时尚报道。该过程允许通过仅两个简单的合成操作和单次色谱纯化以高总产率组装复杂的多环结构。值得注意的是,据报道,第一个支架源自高度选择性的闭环事件序列,涉及三个内部氨基亲核试剂。