Carbonylative Synthesis of Phthalimides and Benzoxazinones by Using Phenyl Formate as a Carbon Monoxide Source
作者:Sujit P. Chavan、Bhalchandra M. Bhanage
DOI:10.1002/ejoc.201500109
日期:2015.4
efficient palladium-catalyzed carbonylative cyclization of N-substituted 2-iodobenzamides and 2-iodoanilides was investigated for the synthesis of phthalimides and benzoxazinones, respectively, by usingphenylformate as a CO source. The present catalytic protocol circumvents the use of an expensive phosphine ligand as well as solvent in the case of the phthalimidesynthesis. Moreover, mild reaction conditions
通过使用甲酸苯酯作为 CO 源,研究了一种简单有效的钯催化的 N-取代 2-碘苯甲酰胺和 2-碘苯胺的羰基化环化反应,分别用于合成邻苯二甲酰亚胺和苯并嗪酮。本催化协议在邻苯二甲酰亚胺合成的情况下避免使用昂贵的膦配体以及溶剂。此外,温和的反应条件和对各种官能团的耐受性增强了该方法的普遍适用性。
Highly regioselective, electrophile induced cyclizations of 2-(prop-1-ynyl)benzamides
We report an electrophile promoted, highly regioselective (∼100%) synthesis of 5-membered haloimidiates from 2-(1-alkynyl)benzamides under metal free conditions. The steric bulk in association with neighbouring group assistance at the propargylic carbon of an alkyne has been employed as the dictating factor to achieve the regioselectivity. A very broad structural diversity has been observed for propargylic
for the direct arylation of benzothiazole by employing oxime-derived palladacycle 1 as a catalyst was developed. The new catalyst system can be used for 2-arylations by using aryl bromides and iodides. In addition, this method is especially suitable for the intramolecular direct coupling of bromo- and iodoamides, as well aschloroamides, to achieve a rapid synthesis of benzo[c]phenanthridine alkaloids
Cascade synthesis of azoquinazolinones by Cu(I)-catalyzed C–N coupling/C–H activation/C–N formation reactions under O2
作者:Dingben Chen、Qiufang Chen、Miaochang Liu、Shuangqun Dai、Ling Huang、Jianguo Yang、Weiliang Bao
DOI:10.1016/j.tet.2013.05.071
日期:2013.8
A ‘one-pot’ method has been developed for the synthesis of azoquinazolinones from substituted 2-halo-benzamides and different N-heterocycles via Cu(I)-catalyzedC–Ncoupling/C–H activation/C–N formation process under O2. A number of azoquinazolinones containing different azole rings and substituents were obtained in good yields.
已经开发了一种“一锅法”,通过在Cu(I)催化下的C–N偶联/ C–H活化/ C–N形成过程,由取代的2-卤代苯甲酰胺和不同的N-杂环合成偶氮喹唑啉酮。 O 2。以良好的产率获得了许多含有不同的唑环和取代基的偶氮喹唑啉酮。
Synthesis of Isocoumarin Derivatives via the Copper-Catalyzed Tandem Sequential Cyclization of 2- Halo-<i>N</i>-phenyl Benzamides and Acyclic 1,3-Diketones
作者:Veerababurao Kavala、Cheng-Chuan Wang、Deepak Kumar Barange、Chun-Wei Kuo、Po-Min Lei、Ching-Fa Yao
DOI:10.1021/jo300501j
日期:2012.6.1
A facile and rapid synthesis of isocoumarin derivatives using a copper-catalyzed tandem C–C/C–O coupling strategy from readily available substrates is described. The reactions of a wide range of 2-iodo-N-phenyl benzamides and acyclic diketones as starting materials were investigated.