6-((3-amino-3-methylhex-5-en-1-yl)oxy)-9-(4-methoxy-2-methylphenyl)-3H-xanthen-3-one 在
聚合甲醛 作用下,
以
aq. phosphate buffer 为溶剂,
反应 2.0h,
生成 Tokyo green
参考文献:
名称:
用于活细胞中甲醛荧光成像的通用 Aza-Cope 反应触发器的开发
摘要:
甲醛 (FA) 是一种反应性信号分子,它通过从表观遗传学到单碳代谢的许多中心生物途径不断产生。另一方面,异常的、升高的 FA 水平与从哮喘到神经退行性疾病的疾病状态有关。在这种情况下,用于 FA 成像的基于荧光的探针正在成为潜在的强大化学工具,有助于解开 FA 稳态的复杂性及其生理和病理贡献。目前可用的 FA 指标需要通过复杂的合成考虑直接修改荧光团骨架以启用 FA 检测,这通常将设计的泛化限制到其他荧光团类别。为了应对这一挑战,我们现在提出理性的,利用 2-aza-Cope 反应性对生命系统中的 FA 进行选择性和灵敏检测的基于反应的一般触发器的迭代开发。具体来说,我们开发了一种高烯丙胺功能,该功能可以进行随后的自我牺牲 β-消除,产生一种 FA 响应触发器,能够掩盖荧光团或任何其他潜在化学支架上的苯酚,用于相关成像和/或治疗应用。我们通过创建一系列用于 FA 的荧光探针来展示此触发器的
tumor-suppressor gene FHIT is one candidate. The gene product, FHIT protein, has a unique dinucleoside triphosphate hydrolase (AP3Aase) activity, and in this study, we designed and synthesized a series of FHIT fluorescentprobes utilizing this activity. We optimized the probe structure for high and specific reactivity with FHIT and applied the optimized probe in a screening assay for FHIT inhibitors. Screening of
A fluorescent probe which is represented by the following formula (I):
(wherein, R1 represents a monovalent substituent other than hydrogen atom, carboxy group, or sulfo group; R2 represents hydrogen atom, or a monovalent substituent; R3 and R4 each independently represents hydrogen atom or a halogen atom; and R5 represents a monovalent group which is cleaved by contact with a measuring object, provided that a combination of R1 and R2 is selected so that the oxidation potential of the benzene ring to which they bind makes (1) the compound represented by the formula (I) substantially no fluorescent before the cleavage, and (2) a compound after the cleavage, which is derived from the compound represented by the formula (I), substantially highly fluorescent after the cleavage).
Design and Synthesis of a Calcium-Sensitive Photocage
作者:Laurel M. Heckman、Jonathan B. Grimm、Eric R. Schreiter、Charles Kim、Mark A. Verdecia、Brenda C. Shields、Luke D. Lavis
DOI:10.1002/anie.201602941
日期:2016.7.11
Photolabileprotectinggroups (or “photocages”) enable precise spatiotemporal control of chemical functionality and facilitate advanced biological experiments. Extant photocages exhibit a simple input–output relationship, however, where application of light elicits a photochemical reaction irrespective of the environment. Herein, we refine and extend the concept of photolabilegroups, synthesizing
光不稳定的保护基团(或“光笼”)可以实现化学功能的精确时空控制,并促进先进的生物实验。然而,现存的光笼表现出简单的输入输出关系,无论环境如何,光的应用都会引发光化学反应。在此,我们完善并扩展了光不稳定基团的概念,合成了第一个Ca 2+敏感光笼。该系统充当化学符合检测器,仅在存在光和升高的 [Ca 2+ ] 的情况下释放小分子。用这种离子敏感部分封闭荧光团会产生一个“离子积分器”,它可以永久标记在照明定义的时间段内经历高 Ca 2+通量的细胞。我们的总体设计理念展示了一种用于细胞成像、传感和靶向分子递送的新型光敏材料。
TokyoGreen derivatives as specific and practical fluorescent probes for UDP-glucuronosyltransferase (UGT) 1A1
TokyoGreen (TG) derivatives were found to be efficient and specific substrates of an important drug-metabolizing enzyme, UDP-glucuronosyltransferase (UGT) 1A1. A rapid, specific, and sensitive assay of the enzyme was achieved simply by monitoring the change in fluorescence intensity. We also designed and developed the first “turn-on” fluorescent probes for UGTs.
A compound represented by the formula (I) (R
1
represents hydrogen atom or a monovalent substituent; R
2
and R
3
represent hydrogen atom, an alkyl group, or a halogen atom; R
4
and R
5
represent an alkyl group or an aryl group; R
6
and R
7
represent hydrogen atom, an alkyl group, or a halogen atom; R
8
represent hydroxy group or a dialkoxyboranetriyl group; and X represents silicon atom, germanium atom, or tin atom), which is a novel fluorophore usable as a mother nucleus of an off/on type fluorescent probe not utilizing the intramolecular photoinduced electron transfer.