Imidazotetrazines as Weighable Diazomethane Surrogates for Esterifications and Cyclopropanations
作者:Riley L. Svec、Paul J. Hergenrother
DOI:10.1002/anie.201911896
日期:2020.1.27
Diazomethane is one of the most versatile reagents in organic synthesis, but its utility is limited by its hazardous nature. Although alternative methods exist to perform the unique chemistry of diazomethane, these suffer from diminished reactivity and/or correspondingly harsher conditions. Herein, we describe the repurposing of imidazotetrazines (such as temozolomide, TMZ, the standard of care for
重氮甲烷是有机合成中用途最广泛的试剂之一,但其用途受到其危险性的限制。尽管存在执行重氮甲烷独特化学反应的替代方法,但这些方法会降低反应性和/或相应地更苛刻的条件。在此,我们描述了咪唑四嗪(例如替莫唑胺,TMZ,胶质母细胞瘤的护理标准)的再利用,用作烷基重氮试剂的合成前体。TMZ 被用于进行酯化和金属催化的环丙烷化反应,结果表明从各种底物形成甲酯特别有效且操作简单。TMZ 是一种市售固体,无爆炸性和无毒,应广泛用作重氮甲烷的替代品。