Investigating N-methoxy-N′-aryl ureas in oxidative C–H olefination reactions: an unexpected oxidation behaviour
作者:Jens Willwacher、Souvik Rakshit、Frank Glorius
DOI:10.1039/c1ob05636k
日期:——
Herein, we report a urea derived directing group for mild and highly selective oxidative CâH bond olefination. Subsequent intramolecular Michael addition affords dihydroquinazolinones in good yields. The NâO bond of the urea substrate exhibits superior oxidative behaviour compared to a variety of other external oxidants.
Synthesis of Azoxy Compounds: from Copper Compounds to Mesoporous Silica‐Encaged Ultrasmall Copper Catalysts
作者:Zhi‐Peng Han、Shiqi Wang、Qiming Sun、Xiao‐Ping Xu、Shun‐Jun Ji
DOI:10.1002/cssc.202300477
日期:2023.9.8
A series of azoxy compounds were constructed via coupling reactions by using cost-effective N-methoxyformamide and nitroso compounds over Cu-based catalysts. The mesoporous silica nanosphere-encapsulated ultra-small Cu (Cu@MSN) catalyst was developed and exhibited remarkably enhanced catalytic activity and superior recycling stability.