Singlet oxygen mediated one pot synthesis of N-pyridinylamides via oxidative amidation of aryl alkyl ketones
作者:Firdoos Ahmad Sofi、Rohit Sharma、S.N. Kavyasree、Sumi Aisha Salim、Pravin J. Wanjari、Prasad V. Bharatam
DOI:10.1016/j.tet.2019.130536
日期:2019.10
An environmental friendly, efficient protocol has been realized for the synthesis of N-pyridinylamides via copper catalyzed oxidative amidation of arylalkylketones with 2-aminopyridines. This one pot protocol involves chemo selective cleavage of C (O)–C bond in the presence of singlet oxygen. The reaction conditions are simple, tolerates wide range of substrates and the products were formed in good
compounds showed broad‐spectrum antimycobacterial activity against M. tuberculosis H37Ra, M. smegmatis and M. aurum. N‐(pyridin‐2‐yl)benzamides were generally more active than N‐(pyridin‐3‐yl)benzamides, indicating that N‐1 in the parental structure of N‐pyrazinylbenzamides might be more important for antimycobacterial activity than N‐4. Marginal antibacterial and antifungal activity was observed for title
CuI incorporated cobalt ferrite nanoparticles as a magnetically separable catalyst for oxidative amidation reaction
作者:Mintu Maan Dutta、Hrishikesh Talukdar、Prodeep Phukan
DOI:10.1039/c9dt03440d
日期:——
of the catalyst has been demonstrated for the synthesis of N-(pyridin-2-yl) benzamidevia oxidative amidation of aryl aldehydes with 2-amino pyridine in the presence of an oxidant. The reaction was carried out in DMSO at 80 °C using TBHP (70% aqueous) in the presence of 20 wt% of the catalyst. Notably, the catalyst could be separated from the reaction mixture in the presence of an external magnetic
通过将CuI固定在CoFe 2 O 4磁性纳米粒子的改性表面上,已开发了掺Cu的磁性纳米催化剂(CoFe 2 O 4 @SiO 2 -SH-CuI)。首先用3-巯基丙基三乙氧基硅烷处理涂覆有二氧化硅的钴铁氧体磁芯的表面,以产生硫醇官能化的纳米粒子CoFe 2 O 4 @SiO 2 -SH。用CuI进一步处理纳米颗粒产生了所需的磁性纳米催化剂。该催化剂的通用性已被证实用于合成ñ - (吡啶-2-基)苯甲酰胺通过在氧化剂存在下,芳基醛与2-氨基吡啶的氧化酰胺化反应 反应在80%的DMSO中使用TBHP(70%水溶液)在20wt%催化剂的存在下进行。值得注意的是,可以在存在外部磁场的情况下将催化剂从反应混合物中分离出来。在研究过程中,合成了一种新的化合物N-(吡啶-2-基)蒽-2-羧酰胺,并研究了其对各种金属离子的荧光传感特性。荧光实验和理论研究表明,新合成的羧酰胺分子可用于水溶液中Hg 2+离子的荧光传感。
Towards a sustainable synthesis of amides: chemoselective palladium-catalysed aminocarbonylation of aryl iodides in deep eutectic solvents
A palladium-catalysed aminocarbonylation of (hetero)aryliodides has, for the first time, been accomplished in deep eutectic solvents as environmentally benign and recyclable media, under mild conditions. The reactions proceeded with a good substrate scope, and a variety of amides have been synthesized in yields up to 98%.
Transformation of aldehydes or alcohols to amides at room temperature under aqueous conditions
作者:Dao-Qing Dong、Shuang-Hong Hao、Hui Zhang、Zu-Li Wang
DOI:10.1016/j.cclet.2017.03.008
日期:2017.7
Abstract A novel and efficient method for the synthesis of amide has been developed. The reactions proceeded smoothly under aqueous conditions at room temperature and generated the corresponding products in good to excellent yields. It is worth noting that alkyl amines which did not react in known approaches are well tolerated in our system.