Metal-Free Intramolecular Amination: One-Pot Tandem Synthesis of 3-Substituted 4-Quinolones
摘要:
3-Substituted 4-quinolones were synthesized using a one-pot metal-free strategy in moderate to quantitative yields. Carried out in dimethylsulfoxide (DMSO) via a sequential addition of materials, the methodology is tolerant of a wide range of functional groups and applicable to library synthesis.
A simple and efficient palladium-catalyzed intramolecular carbonylativesynthesis of isocoumarins and phthalides from the easily available starting materials by employing phenylformate as a CO surrogate has been achieved. The approach affords target compounds in good to excellent yields with the advantages of lower toxicity, milder conditions, easy operation and wide functional group tolerance.
Copper‐Catalyzed Synthesis of Substituted 4‐Quinolones using Water as a Benign Reaction Media: Application for the Construction of Oxolinic Acid and BQCA
作者:Babasaheb Sopan Gore、Chein Chung Lee、Jessica Lee、Jeh‐Jeng Wang
DOI:10.1002/adsc.201900286
日期:2019.7.11
−NO2, −SO2Ar, and −COAr were also successful. In addition, reaction with heterocyclic compounds such as 3‐(3‐bromothiophen‐2‐yl)‐3‐oxopropanenitrile proceeded smoothly to afford tetrahydrothieno[3,2‐b]pyridine‐6‐carbonitrile analogues. The practicality of the designed protocol was confirmed by gram scale synthesis of two derivatives.
已开发出一种铜催化的三组分合成方法,用于从取代的3-(2-卤代苯基)-3-氧代丙烷,醛和水溶液合成取代的4-喹诺酮衍生物。NH 3使用水作为对环境无害的反应介质。此外,所获得产品的合成效用已成功地用于合成可用的亚氧酸和BQCA药物。该方法的关键特征包括可商购的起始原料,广泛的范围以及中等至良好的反应产率。与甲醛反应,以及其他官能团,例如-CN,-NO 2,-SO 2Ar和-COAr也成功。此外,与杂环化合物(如3-(3-溴噻吩-2-基)-3-氧代丙烷腈)的反应进行得很顺利,得到了四氢噻吩并[3,2 - b ]吡啶-6-腈的类似物。两种衍生物的克级合成证实了所设计方案的实用性。
Palladium-Catalyzed Synthesis of Isocoumarins and Phthalides via <i>tert</i>-Butyl Isocyanide Insertion
作者:Xiang-Dong Fei、Zhi-Yuan Ge、Ting Tang、Yong-Ming Zhu、Shun-Jun Ji
DOI:10.1021/jo302004u
日期:2012.11.16
efficient strategy for the synthesis of isocoumarins and phthalides through a palladium(0)-catalyzed reaction incorporating tert-butyl isocyanide has been developed. This process, providing one of the simplest methods for the synthesis of this class of valuable lactones, involves two steps including cyclization reaction and simple acid hydrolysis. The methodology is tolerant of a wide range of substrates
novel nickel catalyst for the reaction of tert-butyl isocyanide insertion was discovered. In this approach, 1,2-bis(diphenylphosphino)ethane (L3) serves as an efficient ligand, thereby allowing the preparation of lactones from (o-bromophenyl)phenylethanone derivatives. It is noteworthy that this is the first example of nickel acting as a metal catalyst in the reactions of tert-butyl isocyanide insertion
Palladium-catalyzed chemoselective synthesis of indane-1,3-dione derivatives via tert-butyl isocyanide insertion
作者:Huaqing Duan、Zhong Chen、Li Han、Yulin Feng、Yongming Zhu、Shilin Yang
DOI:10.1039/c5ob00472a
日期:——
A simple and efficient strategy for the synthesis of indane-1,3-dione derivatives through a palladium(0)-catalyzed reaction incorporating tert-butyl isocyanide has been developed.