chalcone-phenylhydrazone;Benzylidenacetophenon-phenylhydrazon;Chalkon-phenylhydrazon;Phenylhydrazon von 1,3-Diphenyl-2-propen-1-on;Phenyl-styryl-keton-phenylhydrazon;Benzalacetophenon-phenylhydrazon;N-(1,3-diphenylprop-2-enylideneamino)aniline
组织蛋白酶已成为黑素瘤治疗的潜在药物靶标,并引起研究人员的关注,以开发和评估半胱氨酸组织蛋白酶抑制剂作为癌症治疗剂。在这个方向上,我们设计,合成和体外分析了查尔酮的30种低分子量功能化类似物的小文库,用于评估结构-活性关系以及对组织蛋白酶B和H的抑制效力。查尔酮hydr,其为开链类似物,其后为环化衍生物吡唑啉和吡唑。所有合成的化合物均被确立为这些酶的可逆抑制剂。组织蛋白酶B被各系列化合物选择性抑制。化合物1d,2d和4d被认为是组织蛋白酶B最有效的抑制剂,其K i值为0.042μM,0.053μM和0.131μM,而1b(K i = 1.111μM),2b(K i = 1.174μM)和4b(K i = 1.562μM)有效抑制组织蛋白酶H活性。而且,出色的组织蛋白酶B抑制剂被–NO 2功能化,但是–Cl取代的部分是所有设计化合物中最有说服力的组织蛋白酶H抑制剂。使用iGemdock进行的分子对接研究提供了宝贵的见解。
Radical-Mediated Diamination of Alkenes with Phenylhydrazine and Azodicarboxylates: Highly Diastereoselective Synthesis of<i>trans</i>-Diamines from Cycloalkenes
作者:Ming-Kui Zhu、Yu-Chen Chen、Teck-Peng Loh
DOI:10.1002/chem.201203832
日期:2013.4.22
Metal‐free synthesis: Diamination of alkenes by using phenylhydrazine and azodicarboxylates could be achieved in a one‐pot manner under very mild conditions (see scheme; Boc=tert‐butoxycarbonyl). This process works with the assistance of acetic acid by means of a radical mechanism and displays a high trans selectivity when cycloalkene substrates were used in the reaction.
An unprecedented ruthenium(II)-catalyzed intramolecularoxidative C–N coupling method has been developed for the facile synthesis of a variety of synthetically challenging tri- and tetrasubstituted pyrazoles. Dioxygen gas is employed as the oxidant in this transformation. The reaction demonstrates excellent reactivity, functional group tolerance, and high yields.
Synthesis of 1<i>H</i>-indazoles by an electrochemical radical C<sub>sp<sup>2</sup></sub>–H/N–H cyclization of arylhydrazones
作者:Hao Wan、Dongting Li、Huadan Xia、Liwen Yang、Hesham Alhumade、Hong Yi、Aiwen Lei
DOI:10.1039/d1cc04656j
日期:——
bond-forming reactions to N-heterocyclic frameworks has been a long-standing interest in organic synthesis. In this work, we develop an electrochemical radical Csp2–H/N–H cyclization of arylhydrazones to 1H-indazoles. The electrochemical anodic oxidation approach was adopted to synthesize a variety of 1H-indazole derivatives in moderate to good yields. HFIP was not only employed as a solvent or the proton donor
Oxidative cyclization of arylhydrazones of chalcones and benzalacetones to pyrazoles by thianthrene cation radical
作者:Albert C. Kovelesky、Henry J. Shine
DOI:10.1021/jo00244a024
日期:1988.4
Synthesis of 1<i>H</i>-Indazoles and 1<i>H</i>-Pyrazoles via FeBr<sub>3</sub>/O<sub>2</sub> Mediated Intramolecular C–H Amination
作者:Tianshui Zhang、Weiliang Bao
DOI:10.1021/jo3026862
日期:2013.2.1
A new synthesis of substituted 1H-indazoles and 1H-pyrazoles from arylhydrazones via FeBr3/O-2 mediated C-H activation/C-N bond formation reactions is reported. The corresponding 1,3-diaryl-substituted indazoles and trisubstituted pyrazoles were obtained in moderate to excellent yields under mild conditions.