Nanoparticles tungstophosphoric acid supported on polyamic acid: catalytic synthesis of 1,8-dioxo-decahydroacridines and bulky bis(1,8-dioxo-decahydroacridine)s
摘要:
制备了聚氨基甲酸酯(TPA NPs/PAA)支撑的钨磷酸纳米颗粒,并将其用作催化剂,用于在乙醇-水溶液中通过 5,5-二甲基-1,3-环己二酮和各种醛与苯胺或醋酸铵的一锅缩合反应,方便地选择性合成 1,8-二氧代十氢吖啶和一些笨重的双(1,8-二氧代十氢吖啶)。该催化剂通过傅立叶变换红外光谱(FT-IR)、X 射线衍射(XRD)、场发射扫描电子显微镜(FESEM)、透射电子显微镜(TEM)、热重分析(TG)、能量色散 X 射线分析(EDAX)和电感耦合等离子体光发射光谱(ICP-OES)进行了表征。催化剂具有很高的热稳定性和良好的重复使用性。在所述反应条件下,产物分离纯度高,催化剂在简单的操作过程中即可轻松分离,并可多次循环使用而不会明显丧失活性。该反应的特点是反应时间短、效率高、反应条件温和。
Silica-Functionalized CuI: An Efficient and Selective Catalyst for N-Benzylation, Allylation, and Alkylation of Primary and Secondary Amines in Water
摘要:
Silica-functionalized CuI has been reported as an efficient and selective catalyst for the selective mono-N- and N,N-dibenzylation, allylation, and alkylation of primary amines with benzylic, allylic, and alkyl halides using NaOH as base in aqueous medium. By changing the reaction temperature, mono- or di-benzylation, allylation, or alkylation could be achieved in good yield and selectivity. Secondary amines have also been benzylated, allylated, and alkylated under similar conditions. SiO2-CuI has been characterized by Fourier transform-infrared, atomic absorption spectrometry, thermalgravimetric analysis, X-ray diffraction, scanning electron microscopy, and transmission electron microscopy, and found to be highly selective and recyclable under the reaction conditions. [Supplementary materials are available for this article. Go to the publisher's online edition of Synthetic Communications (R) for the following free supplemental resource(s): Full experimental and spectral details.]
Direct arylation of tertiary amines via aryne intermediates using diaryliodonium salts
作者:Zhiang Zhang、Xunshen Wu、Jianwei Han、Wenjun Wu、Limin Wang
DOI:10.1016/j.tetlet.2018.03.067
日期:2018.5
With a strategy by usingdiaryliodoniumsalts as the precursors of benzynes, direct N-arylation of tertiary amines with diaryliodoniumsalts was reported. Thus, the desired aromatic tertiary amines with a wide range of substituents were synthesized in moderate to excellent yields of 55–91%.
SILICON BASED DRUG CONJUGATES AND METHODS OF USING SAME
申请人:BlinkBio, Inc.
公开号:US20170202970A1
公开(公告)日:2017-07-20
Described herein are silicon based conjugates capable of delivering one or more payload moieties to a target cell or tissue. Contemplated conjugates may include a silicon-heteroatom core, one or more optional catalytic moieties, a targeting moiety that permits accumulation of the conjugate within a target cell or tissue, one or more payload moieties (e.g., a therapeutic agent or imaging agent), and two or more non-interfering moieties covalently bound to the silicon-heteroatom core.
Buchwald-Hartwig Aminations of Aryl Chlorides: A Practical Protocol Based on Commercially Available Pd(0)-NHC Catalysts
作者:L. J. Gooßen、A. Rivas-Nass、J. Paetzold、O. Briel、R. Karch、B. Kayser
DOI:10.1055/s-2004-837205
日期:——
naphthoquinone imidazolin-2-ylidene-palladium(0) complexes were found to be highlyactive one-component catalysts for the amination of aryl halides. With these very robust catalysts, the expensive bases Cs 2 CO 3 or NaOt-Bu traditionally used can be replaced by KOH. A convenient reaction protocol has been developed for the coupling of a wide range of arylchlorides with primary or secondary amines.
The present invention provides pharmacological compounds including an effector moiety conjugated to a binding moiety that directs the effector moiety to a biological target of interest. Likewise, the present invention provides compositions, kits, and methods (e.g., therapeutic, diagnostic, and imaging) including the compounds. The compounds can be described as a protein interacting binding moiety-drug conjugate (SDC-TRAP) compounds, which include a protein interacting binding moiety and an effector moiety. For example, in certain embodiments directed to treating cancer, the SDC-TRAP can include an Hsp90 inhibitor conjugated to a cytotoxic agent as the effector moiety.
Transition-Metal-Free, Potassium tert-Butoxide/Dimethyl Sulfoxide Mediated Amination between Tertiary Amines and Aryl Halides
作者:Jian-Mei Lu、Pei Huang、Bang-Yue He、Hui-Min Wang
DOI:10.1055/s-0034-1379367
日期:——
C–N bond-formation reaction between tertiary amines and aryl halides is reported. Under the optimal conditions, various aromatic and aliphatic tertiary amines react with aryl halides, including iodides, bromides, and chlorides, to give mono-aminated products, N,N-dialkylanilines and N-alkyl-N-arylanilines, in good to high yields. Based on the experimental results, the reaction is believed to occur