Click‐to‐Release from
<i>trans</i>
‐Cyclooctenes: Mechanistic Insights and Expansion of Scope from Established Carbamate to Remarkable Ether Cleavage
作者:Ron M. Versteegen、Wolter ten Hoeve、Raffaella Rossin、Mark A. R. de Geus、Henk M. Janssen、Marc S. Robillard
DOI:10.1002/anie.201800402
日期:2018.8.13
leaving group. In contrast to the widely used p‐aminobenzyloxy linker, which affords cleavage of aromatic but not of aliphatic ethers, the aromatic, benzylic, and aliphatic TCO ethers were cleaved as efficiently as the carbamate, carbonate, and esters. Bioorthogonal ether release was demonstrated by the rapid uncaging of TCO‐masked tyrosine in serum, followed by oxidation by tyrosinase. Finally, tyrosine
与四嗪反应后,可从反式-环辛烯(TCO)进行生物正交裂解的烯丙基氨基甲酸酯。我们在本文中公开了该反应还可以裂解TCO酯,碳酸酯和令人惊奇的醚。机理研究表明,消除主要是由迅速消除的1,4-二氢哒嗪互变异构体的形成决定的,而较少取决于离去基团的性质。与广泛使用的p相反-氨基苄氧基连接基,可裂解芳族醚,但不裂解脂族醚,芳族,苄基和脂族TCO醚的裂解效率与氨基甲酸酯,碳酸酯和酯一样。快速解开血清中TCO掩盖的酪氨酸,然后酪氨酸酶氧化,证明了生物正交醚的释放。最后,酪氨酸解笼用于化学控制无酪氨酸培养基中的细胞生长。