Cocktails of Tb3+ and Eu3+ Complexes: A General Platform for the Design of Ratiometric Optical Probes
摘要:
Fluorescent and luminescent reporters that signal molecular events of interest by modulating the ratio of peaks in their emission profile have advantages over reporters that simply modulate their emission intensity, since ratiometric measurement is concentration-independent and allows them to be effective in complex contexts, such as living cells or sensor microarrays. We herein describe a general platform for the design of ratiometric probes based on a heterometallic Tb3+/Eu3+ bis-lanthanide ensemble, consisting of a mixture, or "cocktail", of otherwise identical heterometalated chelates. The chelate contains an organic photon antenna that sensitizes the Tb3+/Eu3+ luminescence. The contributions of the two metals to the composite luminescence spectrum can be tuned to the same relative scale by adjusting the stoichiometry of the cocktail, allowing subtle changes in their ratio to be accurately measured. Importantly, the ratio responds to chemical and environmental changes experienced by the photon antenna, making the system an ideal platform for the design of chemical and enzymatic probes. As proofs of concept, we describe a ratiometric probe for esterase activity and a polarity-responsive ratiometric sensor.
Selective N-Alkylation of Amines with Alcohols by Using Non-Metal-Based Acid-Base Cooperative Catalysis
作者:Ya Du、Shunsuke Oishi、Susumu Saito
DOI:10.1002/chem.201102446
日期:2011.10.24
straightforward method for the selective N‐mono‐ and dialkylation of amines with alcohols by means of non‐metal‐based catalysis promoted by TAPC is reported (see scheme). Selectivity of the N‐mono‐ and dialkylation, substrate scope and functional‐group tolerance are highlighted with respect to each amine (1° and 2°; aromatic and aliphatic) and alcohol (1°, 2° and 3°; benzylic and aliphatic) component.
SiO2-Cu2O: An efficient and recyclable heterogeneous catalyst for N-benzylation of primary and secondary amines
作者:Manjulla Gupta、Satya Paul、Rajive Gupta
DOI:10.1016/s1872-2067(14)60009-7
日期:2014.3
Abstract A mild, effective, and selective procedure is reported for the mono N -benzylation and N , N -dibenzylation of primary amines as well as mono N -benzylation of secondary amines using silica-supported copper(I) oxide in water. The silica-supported Cu 2 O was generated in situ by the reaction of Fehling solution and glucose at 100 °C onto activated silica. The catalyst was filtered, washed with
摘要 报道了一种温和、有效和选择性的程序,用于伯胺的单 N -苄基化和 N , N - 二苄基化以及使用二氧化硅负载的氧化铜 (I) 在水中的仲胺的单 N - 苄基化。二氧化硅负载的 Cu 2 O 是通过 Fehling 溶液和葡萄糖在 100°C 下在活化二氧化硅上的反应原位生成的。将催化剂过滤、水洗、烘干,并通过傅里叶变换红外光谱、热重分析、扫描电镜、透射电镜和原子吸收光谱进行表征。发现制备的 Cu 2 O-SiO 2 在高达 325 °C 时是热稳定的。铜均匀分布在二氧化硅表面,平均粒径为7 nm。该催化剂用作伯胺和仲胺的 N-苄基化的选择性多相催化剂。该催化剂是可回收的,有效使用到第五轮,催化活性没有显着损失。对包括水、乙腈和甲苯在内的各种反应溶剂进行了胺的 N-苄基化筛选,水系统的成功突出了该过程对环境的低影响。
A Phosphine-Mediated Dearomative Skeletal Rearrangement of Dianiline Squaraine Dyes
作者:Emily P. Bacher、Kevin J. Koh、Antonio J. Lepore、Allen G. Oliver、Olaf Wiest、Brandon L. Ashfeld
DOI:10.1021/acs.orglett.1c00248
日期:2021.4.16
A phosphorus(III)-mediated dearomatization of ortho-substituted dianiline squaraine dyes results in an unusual skeletalrearrangement to provide exotic, highly conjugated benzofuranone and oxindole scaffolds bearing a C3 side chain comprised of a linear conflagration of an enol, a phosphorus ylide, and 2,4-disubstituted aniline. Employing experimental and computational analysis, a mechanistic evaluation
[EN] TEAD INHIBITORS AND USES THEREOF<br/>[FR] INHIBITEURS DE TEAD ET LEURS UTILISATIONS
申请人:CEDILLA THERAPEUTICS INC
公开号:WO2022204452A1
公开(公告)日:2022-09-29
The present application relates to compounds of formula (I'), pharmaceutically acceptable compositions thereof, and methods of using the same. The compounds of formula I' are TEAD inhibitors, useful in the treatment of cancer.