Intramolecular 1,3-dipolar cycloaddition as a route to triazolobenzodiazepines and pyrrolobenzodiazepines
作者:Christopher S. Chambers、Nilesh Patel、Karl Hemming
DOI:10.1016/j.tetlet.2010.07.050
日期:2010.9
Intramolecular 1,3-dipolar cycloaddition between an alkyne and an azide leads to a series of 1,2,3-triazolo-fused 1,4-benzodiazepines, 1,2,5-benzothiadiazepines, pyrrolobenzodiazepines and pyrrolobenzothiadiazepines (eight examples). The products are privileged structures in medicinal chemistry. The precursor azido alkynes are obtained, usually as transient intermediates, by treatment of the corresponding
炔烃和
叠氮化物之间的分子内1,3-偶极环加成导致一系列
1,2,3-三唑并稠合的1,4-
苯并二氮杂卓,1,2,5-苯并噻二氮杂卓,
吡咯并
苯并二氮杂卓和
吡咯并苯并噻二氮杂卓(八个实例)。该产品是药物
化学中的特权结构。通过用Bestmann-Ohira试剂处理相应的醛(衍生自
α-氨基酸),可以得到前体
叠氮基
炔烃,通常作为过渡中间体。