一种新型瞬态 SET 介体方法已被开发用于光诱导自由基-自由基交叉偶联反应。利用原位产生的噻蒽自由基阳离子作为瞬态SET介体,在温和条件下实现了芳基噻蒽鎓盐的硫氰化和硒氰化,无需光催化剂或单一电子给体。与光触媒工艺相比,该方案具有条件温和、操作简单、底物范围广泛、优异的官能团和杂环耐受性等特点。由于芳基噻啉鎓盐的可行可及性,该方法也已应用于生物活性分子的有效合成以及复杂芳烃的后期功能化。
Highly efficient Sandmeyer reaction on immobilized Cu I /Cu II -based catalysts
作者:Irina G. Tarkhanova、Michail G. Gantman、Alexander S. Sigeev、Konstantin I. Maslakov、Vladimir M. Zelikman、Irina P. Beletskaya
DOI:10.1016/j.mencom.2018.05.010
日期:2018.5
Highly effective embodiment of Sandmeyerreaction has been revealed for Cu-based catalysts incorporating ionic liquid on Silochrom support. The most active catalyst (TOF = = 4000–8000 h–1) contains comparable amounts of cuprous and cupric chloride anions. The reported method allows one to carry out the reaction for anilines in the one-pot mode.
Synthesis of 6,7-Dihydro-5H-imidazo[1,2-a]imidazole-3-sulfonic acid amides
申请人:WIRTH Thomas
公开号:US20070173517A1
公开(公告)日:2007-07-26
Disclosed is an improved multi-step process for preparing a compound of Formula I:
wherein R
1
to R
3
are as defined herein. The compounds of formula I inhibit the binding of human intercellular adhesion molecules to the Leukointegrins. As a result, these compounds are useful in the treatment of inflammatory and immune cell-mediated diseases.
公开了一种改进的多步骤制备Formula I化合物的方法:其中R1到R3如本文所定义。 Formula I化合物抑制人类细胞间粘附分子与白细胞整合素的结合。因此,这些化合物在治疗炎症和免疫介导的细胞疾病方面是有用的。
Transition-metal-free cross-coupling of thioethers with aryl(cyano)iodonium triflates: a facile and efficient method for the one-pot synthesis of thiocyanates
作者:Dan Zhu、Denghu Chang、Lei Shi
DOI:10.1039/c5cc00875a
日期:——
A novel transition-metal-free method for the one-step synthesis of thiocyanates via the C-S bond cleavage of readily available thioethers was developed.
Nitromethane has been developed to be an effective cyanating reagent for the synthesis of thiocyanates. In the presence of iodine and base, a wide range of disulfides were reacted with nitromethane smoothly to give diverse thiocyanates in moderate to good yields. (C) 2015 Elsevier Ltd. All rights reserved.