MR signal changes on hepatobiliary imaging after oral ingestion of manganese chloride tetrahydrate: preliminary examination

2013 ◽  
Vol 31 (11) ◽  
pp. 713-723 ◽  
Author(s):  
Nagaaki Marugami ◽  
Megumi Takewa ◽  
Yoshinori Iwaki ◽  
Yutaka Hazeyama ◽  
Kazumi Iwato ◽  
...  
Keyword(s):  
Manganese Chloride ◽  
Hepatobiliary Imaging ◽  
Oral Ingestion ◽  
Preliminary Examination ◽  
Manganese Chloride Tetrahydrate ◽  
Signal Changes

scholarly journals Cyanuric Chloride / Manganese Chloride Tetrahydrate Catalyzed Beckmann Rearrangement of Ketoximes

2019 ◽  
pp. 1-6
Author(s):  
Tong Shen-Yue ◽  
Lu Jue-Lin ◽  
Li Xiao-Wen ◽  
NI Wan-Min ◽  
Xu Ke-Wei ◽  
...  
Keyword(s):  
Catalytic System ◽  
Lewis Acids ◽  
Catalytic Effect ◽  
Beckmann Rearrangement ◽  
Cyanuric Chloride ◽  
Manganese Chloride ◽  
Manganese Chloride Tetrahydrate ◽  
High Yields

In order to find an efficient catalytic system for Beckmann rearrangement of ketoximes, cyanuric chloride and Lewis acids were screened, and the cyanuric chloride /manganese chloride tetrahydrate system with good catalytic effect has been discovered. Using 2 mol% cyanuric chloride and 2 mol% MnCl2·4H2O as catalyst, the yield of Beckmann rearrangement of benzophenone oxime was 96% after refluxing for 2 h in acetonitrile. A variety of ketoximes underwent the Beckmann rearrangement to afford the corresponding amides in moderate to high yields.

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