External‐Radiation‐Induced Local Hydroxylation Enables Remote Release of Functional Molecules in Tumors
作者:Qunfeng Fu、Hongyu Li、Dongban Duan、Changlun Wang、Siyong Shen、Huimin Ma、Zhibo Liu
DOI:10.1002/anie.202005612
日期:2020.11.23
Radiation‐induced cleavage for controlled release in vivo is yet to be established. We demonstrate the use of 3,5‐dihydroxybenzyl carbamate (DHBC) as a masking group that is selectively and efficiently removed by external radiation in vitro and in vivo. DHBC reacts mainly with hydroxyl radicals produced by radiation to afford hydroxylation at para/ortho positions, followed by 1,4‐ or 1,6‐elimination
辐射诱导的体内控制释放的裂解尚待确定。我们证明了使用3,5-二羟基苄基氨基甲酸酯(DHBC)作为掩蔽基团,该掩蔽基团可通过体外和体内的外部辐射选择性地和有效地去除。DHBC主要与辐射产生的羟基自由基反应,在对位/邻位提供羟基化位置,然后进行1,4或1,6消除,以拯救客户分子的功能。该反应是快速的并且可以在生理条件下释放功能性分子。这种控释平台与活体系统兼容,如在细胞和肿瘤异种移植物中释放的Rhodol荧光团衍生物所证明。健壮的笼封基团,良好的释放产量以及渗透深度的独立性的综合优势,使DHBC衍生物成为用于化学生物学和前药活化的有吸引力的化学笼封基团。