Substituted 2-phenyl-4-quinolone-3-carboxylic acid compounds and their use as antitumor agents
申请人:Kuo Sheng-Chu
公开号:US20050032832A1
公开(公告)日:2005-02-10
Substituted 2-phenyl-4-quinolone-3-carboxylic acid derivatives and their salts were synthesized. The results of preliminary screening revealed that these compounds are potent in killing solid tumor cancers.
Synthesis of amides directly from carboxylic acids and hydrazines
作者:Nivedita Bhardwaj、Nancy Tripathi、Sanjay Kumar、Shreyans K. Jain
DOI:10.1039/d3ob01268a
日期:——
method for amide bond synthesis described here utilizes carboxylic acids and hydrazines in the presence of a catalytic amount of ZnCl2. This is the first report that highlights the use of hydrazine as an amine partner for amide synthesis directly with carboxylic acids. Ammonia (gas) is the only by-product in this method. The methodology is simple and could help in the synthesis of peptides and natural
The Ni-catalyzed reaction of ortho-fluoro-substituted aromatic amides with alkynes results in C-F/N-H annulation to give 1(2H)-isoquinolinones. A key to the success of the reaction is the use of KOBut or even weak base, such as Cs2CO3. The reaction proceeds in the absence of a ligand and under mild reaction conditions (40-60 °C). Competition experiments and DFT calculations suggest that the pathway
Nickel-Catalyzed Cross-Electrophile Coupling between C(sp<sup>2</sup>)–F and C(sp<sup>2</sup>)–Cl Bonds by the Reaction of <i>ortho</i>-Fluoro-Aromatic Amides with Aryl Chlorides
作者:Itsuki Nohira、Naoto Chatani
DOI:10.1021/acscatal.1c01102
日期:2021.4.16
between C(sp2)–Fbonds in ortho-fluoro-substituted aromatic amides and C(sp2)–Cl bonds in aryl chlorides in the presence of Zn as a reductant and LiOtBu as a base, and LiCl and ZnCl2 as additives is reported. The reaction displayed excellent functional group tolerance and a broad substrate scope. The reaction was also applicable to cross-electrophile coupling between C(sp2)–F and C(sp2)–O bonds in an
在锌为还原剂和LiO t Bu为原子的情况下,邻氟取代的芳族酰胺中的C(sp 2)-F键与芳基氯中的C(sp 2)-Cl键之间的镍催化交叉亲电子偶联。据报道,LiCl和ZnCl 2作为添加剂。该反应显示出优异的官能团耐受性和广泛的底物范围。该反应也适用于甲苯磺酸芳基酯和三氟甲磺酸酯衍生物中C(sp 2)–F和C(sp 2)–O键之间的亲电子交联。