2-[1H-Benzimidazol-2(3H)-ylidene]-2-(pyrimidin-2-yl)acetamides and 2-[benzothiazol-2(3H)-ylidene]-2-(pyrimidin-2-yl)acetamides as kinase inhibitors
申请人:Aurrecoechea Natalia
公开号:US20100081653A1
公开(公告)日:2010-04-01
2-[1H-benzimidazol-2(3H)-ylidene]-2-(pyrimidin-2-yl)acetamides and 2-[benzothiazol-2(3H)-ylidene]-2-(pyrimidin-2-yl)acetamides and their salts are kinase inhibitors, useful in the treatment of cancer.
Unexpected Hydrobromic Acid-Catalyzed CC Bond-Forming Reactions and Facile Synthesis of Coumarins and Benzofurans Based on Ketene Dithioacetals
作者:Hongjuan Yuan、Mang Wang、Yingjie Liu、Lili Wang、Jun Liu、Qun Liu
DOI:10.1002/chem.201002107
日期:2010.12.3
Hydrobromic acid was found to be a unique catalyst in CC bond‐forming reactions with ketene dithioacetals. Distinctly different from other acids (including Lewis and Brønsted acids), the remarkable catalytic performance of hydrobromic acid in catalytic amounts was observed in the “acid”‐catalyzed reactions of readily available functionalized ketene dithioacetals 1 with various electrophiles. Under
氢溴酸被发现是在C独特催化剂与烯酮二硫C键形成反应。与其他酸(包括路易斯酸和布朗斯台德酸)明显不同,氢溴酸在催化量上的显着催化性能在易于获得的官能化乙烯酮二硫缩醛1与各种亲电试剂的“酸”催化反应中观察到。在0.1当量的氢溴酸的催化下,1与羰基化合物2 a – l的反应生成多官能化的戊-1,4-二烯3或共轭二烯4产量高到极好。该反应在乙烯酮二硫缩醛1和羰基化合物2上均具有宽范围的取代基。这种有效的CC键形成方法的应用是在温和的,无金属的条件下,通过氢溴酸1与水杨醛2 m - o和对苯醌6 a - d的反应生成香豆素5和苯并呋喃7。, 分别。根据抗衡离子的性质,形成了一种新的反应性物种,即一种硫稳定的碳鎓叶立德,这被提议作为氢溴酸独特催化的关键中间体。
Palladium-Catalyzed C–S Bond Cleavage with Allenoates: Synthesis of Tetrasubstituted 2-Alkenylfuran Derivatives
作者:Quannan Wang、Zhuqing Liu、Jiang Lou、Zhengkun Yu
DOI:10.1021/acs.orglett.8b02253
日期:2018.10.5
Palladium-catalyzed C–S cleavage of tetrasubstituted internal alkene α-oxo ketene dithioacetals was realized with allenoates as the coupling partners, efficiently affording tetrasubstituted 2-alkenylfuran derivatives with excellent regioselectivity under mild conditions. Allenoates acted as C1 synthons in the desulfurative [4 + 1] annulation.
determined by the combination of experimental electronic circulardichroism (ECD) investigations and quantum-chemical circulardichroism (QC-CD) calculations. For the atropisomerization of (1M,6M)-6a and (1M,5M)-9a to their (M,P)- and (P,M)-diastereomer, respectively, the possible transition states were investigated and the interconversion barriers (ΔG‡) were theoretically predicted. This study provides
通过在室温下在碱性条件下将核心取代的苯丙酮的共轭碱加成到取代的2-oxo-2 H -pyran-3-甲腈上,以高收率合成受阻位萘取代的联苯和三联苯。这些带有萘基和取代的芳基环的官能团不同的苯(1,2-叔芳基或1,3-叔芳基)显示出各向异性异构现象,具有一个或两个立体双联芳基轴。带有1,2-型或1,3-型手性联芳基轴的萘取代的联苯和三联苯各自的四个阻转异构体的拆分通过HPLC在手性相上实现。6a和9a的绝对立体结构通过实验性电子圆二色性(ECD)研究和量子化学圆二色性(QC-CD)计算相结合来确定。对于(1 atropisomerization中号,6中号) -图6a和(1中号,5中号) -图9a到它们的(中号,P) -和(P,中号)非对映体,分别为可能过渡态进行了研究和互转换障碍(ΔG ‡)在理论上是可以预测的。这项研究为旋转受阻的萘取代的联苯和三联苯的合成,拆分和立体化学表征提供了通用协
Synthesis of new polysubstituted furans incorporating reactive phosphorus ylides or N‑acyliminophosphoranes was achieved by the heterocyclization of flexible α-acyl ketene dithioacetals. This one-pot tandem reaction was initiated by acyl-directed desulfurative Sonogashira coupling, followed by 1,6-addition of phosphine to the in situ-generated enynone and subsequent 5-exo-dig cyclization, as well as