core/shell quantum dots (QDs) can be used as stable and highly active photoredoxcatalysts for efficient transferhydrogenation of imines to amines with thiophenol as a hydrogen atom donor. This reaction proceeds via a proton-coupled electron transfer (PCET) from the QDs conduction band to the protonated imine followed by hydrogen atom transfer from the thiophenol to the α-aminoalkyl radical. This precious
Recyclable covalent triazine framework-supported iridium catalyst for the N-methylation of amines with methanol in the presence of carbonate
作者:Peng Liu、Jiazhi Yang、Yao Ai、Shushu Hao、Xiaozhong Chen、Feng Li
DOI:10.1016/j.jcat.2021.02.030
日期:2021.4
An iridiumcomplex Cp*Ir@CTF, which is synthesized by the coordinative immobilization of [Cp*IrCl2]2 on a functionalized covalent triazine framework (CTF), was found to be a general and highly efficient catalyst for the N-methylation of amines with methanol in the presence of carbonate. Under environmentally benign conditions, a variety of desirable products were obtained in high yields with complete
铱络合物Cp * Ir @ CTF是通过将[Cp * IrCl 2 ] 2配位固定在功能化的共价三嗪骨架(CTF)上合成的,它是一种通用的高效N-甲基化催化剂在碳酸盐的存在下,将胺与甲醇反应。在环境友好的条件下,以高收率获得了各种理想的产品,具有完全的选择性和对官能团的友好性。此外,合成的催化剂可以通过简单的过滤进行再循环,而在第六次循环后没有明显的催化活性损失。值得注意的是,这项研究显示了共价三嗪骨架负载的过渡金属催化剂在氢自动转移过程中的潜力。
Benzylamine derivatives having the general formula ##STR1## wherein R.sub.1 is an iso-propyl or tert-butyl group, R.sub.2 is a group of the formula: ##STR2## and R.sub.3 is a lower alkyl or lower alkenyl group, or its acid addition salt. These derivatives are useful for the treatment of animal epidemics or infectious diseases induced by fungi as an antimycotic agent for humans and animals, for the control of plant diseases as an agricultural fungicide, and for the control of fungi and bacteria in industrial materials or products as an industrial fungicide.