Organocatalytic and Scalable Syntheses of Unsymmetrical 1,2,4,5‐Tetrazines by Thiol‐Containing Promotors
作者:Wuyu Mao、Wei Shi、Jie Li、Dunyan Su、Xiaomeng Wang、Lyuye Zhang、Lili Pan、Xiaoai Wu、Haoxing Wu
DOI:10.1002/anie.201812550
日期:2019.1.21
growing application of tetrazine bioorthogonal chemistry, it is still challenging to access tetrazines conveniently from easily available materials. Described here is the de novo formation of tetrazine from nitriles and hydrazine hydrate using a broad array of thiol‐containing catalysts, including peptides. Using this facile methodology, the syntheses of 14 unsymmetric tetrazines, containing a range of
尽管四嗪生物正交化学的应用不断增长,但仍然难以从易于获得的材料中方便地获得四嗪。此处描述的是使用多种含硫醇的催化剂(包括肽)从腈和水合肼从头形成四嗪。使用这种简便的方法,可以以令人满意的产率实现克级的14种不对称四嗪的合成,其中含有一定范围的反应性官能团。以甲基膦酸四嗪为基础,开发了一种高效的霍纳-沃兹沃思-埃蒙斯反应,可在温和的反应条件下进一步衍生化。具有多种功能的Tetrazine探针可按比例生产,产率为87–93%。