Bifunctional building blocks in the Ugi-azide condensation reaction: a general strategy toward exploration of new molecular diversity
作者:Steven Gunawan、Christopher Hulme
DOI:10.1039/c3ob40900g
日期:——
1,5-Disubstituted tetrazoles are an important drug-like scaffold known for their ability to mimic the cis-amide bond conformation. The scaffold is readily accessible via substitution of the carboxylic acid component of the Ugi multi-component reaction (MCR) with TMSN3 in what is herein denoted the Ugi-azide reaction. This full paper presents a concise, novel, general strategy to access a plethora of new heterocylic scaffolds utilizing tethered aldo/keto-acids/esters in the Ugi-azide reaction followed by a ring closing event that generates novel highly complex bis-heterocyclic lactam-tetrazoles.
1,5-二取代四唑是一类重要的类药物骨架,以其能够模拟顺式酧胺键构象而闻名。该骨架可以通过将Ugi多组分反应(MCR)中的羧酸成分替换为TMSN3,从而在此文中称为Ugi-叠氮反应的方式轻易获得。本篇论文提出了一种简洁、新颖、通用的策略,利用连接在Ugi-叠氮反应中的醛/酮酸/酯,通过环合反应生成新型高度复杂的二杂环内酰胺-四唑结构,来构建大量的新型杂环骨架。