体内应用非常需要具有快速动力学和高效率的生物正交解腐化学,但仍然非常零星。在此,我们描述了N-氧化物和甲硅烷基硼烷之间的一种新的生物正交解腐化学。用“Si”简单替换硼酸中的“C”能够将N-氧化物脱腐动力学显着加速10 6倍( k 2 :高达10 3 M –1 s –1 )。此外,还开发了一种新的N-氧化物掩蔽自焚间隔物,用于在与甲硅烷基硼烷点击时无痕释放各种有效负载,具有快速动力学和高效率(> 90%)。令人印象深刻的是,在4T1小鼠乳腺肿瘤模型中,与母体药物相比,这种基于N-氧化物的自组装生物正交纳米前药与甲硅烷基硼烷的组合显着增强了肿瘤抑制效果。总的来说,这种新的生物正交点击释放化学具有快速动力学和高效率的特点,被认为在化学生物学和药物输送领域有广泛的应用。
体内应用非常需要具有快速动力学和高效率的生物正交解腐化学,但仍然非常零星。在此,我们描述了N-氧化物和甲硅烷基硼烷之间的一种新的生物正交解腐化学。用“Si”简单替换硼酸中的“C”能够将N-氧化物脱腐动力学显着加速10 6倍( k 2 :高达10 3 M –1 s –1 )。此外,还开发了一种新的N-氧化物掩蔽自焚间隔物,用于在与甲硅烷基硼烷点击时无痕释放各种有效负载,具有快速动力学和高效率(> 90%)。令人印象深刻的是,在4T1小鼠乳腺肿瘤模型中,与母体药物相比,这种基于N-氧化物的自组装生物正交纳米前药与甲硅烷基硼烷的组合显着增强了肿瘤抑制效果。总的来说,这种新的生物正交点击释放化学具有快速动力学和高效率的特点,被认为在化学生物学和药物输送领域有广泛的应用。
Cyclization-activated prodrugs. Basic carbamates of 4-hydroxyanisole
作者:Walfred S. Saari、John E. Schwering、Paulette A. Lyle、Steven J. Smith、Edward L. Engelhardt
DOI:10.1021/jm00163a016
日期:1990.1
A series of basic carbamates of 4-hydroxyanisole was prepared and evaluated as progenitors of this melanocytotoxic phenol. All of the carbamates were relatively stable at low pH but released 4-hydroxyanisole cleanly at pH 7.4 at rates that were structure dependent. A detailed study of the N-methyl-N-[2-(methylamino)ethyl]carbamate showed that generation of the parent phenol followed first-order kinetics with t1/2 = 36.3 min at pH 7.4, 37 degrees C, and was accompanied by formation of N,N'-dimethylimidazolidinone. These basic carbamates are examples of cyclization-activated prodrugs in which generation of the active drug is not linked to enzymatic cleavage but rather depends solely upon a predictable, intramolecular cyclization-elimination reaction.
US4812590A
申请人:——
公开号:US4812590A
公开(公告)日:1989-03-14
A Bioorthogonal Decaging Chemistry of <i>N</i>-Oxide and Silylborane for Prodrug Activation both <i>In Vitro</i> and <i>In Vivo</i>
Bioorthogonal decaging chemistry with both fast kinetics and high efficiency is highly demanded for in vivo applications but remains very sporadic. Herein, we describe a new bioorthogonal decaging chemistry between N-oxide and silylborane. A simple replacement of “C” in boronic acid with “Si” was able to substantially accelerate the N-oxide decaging kinetics by 106 fold (k2: up to 103 M–1 s–1). Moreover
体内应用非常需要具有快速动力学和高效率的生物正交解腐化学,但仍然非常零星。在此,我们描述了N-氧化物和甲硅烷基硼烷之间的一种新的生物正交解腐化学。用“Si”简单替换硼酸中的“C”能够将N-氧化物脱腐动力学显着加速10 6倍( k 2 :高达10 3 M –1 s –1 )。此外,还开发了一种新的N-氧化物掩蔽自焚间隔物,用于在与甲硅烷基硼烷点击时无痕释放各种有效负载,具有快速动力学和高效率(> 90%)。令人印象深刻的是,在4T1小鼠乳腺肿瘤模型中,与母体药物相比,这种基于N-氧化物的自组装生物正交纳米前药与甲硅烷基硼烷的组合显着增强了肿瘤抑制效果。总的来说,这种新的生物正交点击释放化学具有快速动力学和高效率的特点,被认为在化学生物学和药物输送领域有广泛的应用。