A protocol of iridium catalyzed asymmetrichydrogenation of 4-alkyl substituted 3-ethoxycarbonyl quinolin-2-ones and coumarins has been reported, providing a wide range of chiral dihydroquinolin-2-ones and dihydrocoumarins in high yields with excellent enantioselectivities (up to 99% ee) and high turnover numbers (up to 28 000). This efficient protocol was successfully applied for the synthesis of
Exploring Synthetic Strategies for 1<i>H</i>‐Indazoles and Their <i>N</i>‐Oxides: Electrochemical Synthesis of 1<i>H</i>‐Indazole <i>N</i>‐Oxides and Their Divergent C−H Functionalizations
作者:Sagar Arepally、Taehoon Kim、Gyeongho Kim、Haesik Yang、Jin Kyoon Park
DOI:10.1002/anie.202303460
日期:2023.6.26
The study reports selective electrochemical synthesis of 1H-indazoles and N-oxides, where electrochemical outcomes were dictated by the cathode material (RVC=reticulated vitreous carbon). The adaptability of 1H-indazole N-oxides for various C−H functionalization reactions was showcased. Furthermore, 1H-indazole N-oxides were utilized to synthesize the pharmaceutical molecules lificiguat and YD (3)
该研究报告了 1 H-吲唑和N-氧化物的选择性电化学合成,其中电化学结果由阴极材料决定(RVC=网状玻璃碳)。展示了1 H -吲唑N -氧化物对各种 C−H 官能化反应的适应性。此外,1 H -吲唑N -氧化物被用于合成药物分子 lificiguat 和 YD (3),各种药物的关键中间体,以及有机发光二极管的前体。
Itier,J.; Casadevall,A., Bulletin de la Societe Chimique de France, 1969, p. 2342 - 2355