this paper, aryldiazo sulfones are prepared from tandem sulfonylation/dehydrogenation reactions of arylhydrazines and sulfonyl chlorides. The transformations proceed well in the presence of catalytic CuSO4·5H2O, leading to aryldiazo sulfones in good to excellent yields. It is believed that this protocol represents a safe and convenient model for the synthesis of these versatile aryldiazo sulfones under
Pyridine‐Catalysed Desulfonylative Addition of β‐Diketones to Arylazosulfones via Diaziridine Rearrangement
作者:Xin Ji、Ling‐Guo Meng、Hailong Xu、Lei Wang
DOI:10.1002/adsc.202001171
日期:2021.2.16
pyridine‐catalysed desulfonylative addition of β‐diketones to arylazosulfones was developed to obtain diazenyl β‐dicarbonyl compounds. The aryldiazenyl group was observed in the desired product from arylazosulfones, and this diazenylation reaction was achieved via a possible rearrangement process based on diaziridine ring cleavage. The scope of the protocol was investigated and a plausible mechanism was
Herein, a DMAP-catalyzed [4+2] annulation of α-substituted allenoates with arylazosulfones is reported, which affords facile access to tetrahydropyridazine derivative in synthetically useful yields. This reaction features mild conditions and good functional group tolerance. Moreover, the resultant products can be readily transformed into pyridazin-3-one derivatives in the presence of DDQ.
A General Amination Method Based on the Addition of Polyfunctional Arylmagnesium Reagents to Functionalized Arylazo Tosylates
作者:Ioannis Sapountzis、Paul Knochel
DOI:10.1002/anie.200353241
日期:2004.2.6
<sup><i>n</i></sup>Bu<sub>3</sub>P-Catalyzed Desulfonylative [3 + 2] Cycloadditions of Allylic Carbonates with Arylazosulfones to Pyrazole Derivatives
作者:Qi Zhang、Ling-Guo Meng、Kuai Wang、Lei Wang
DOI:10.1021/ol503735c
日期:2015.2.20
Highly efficient (Bu3P)-Bu-n-catalyzed desulfonylative [3 + 2] cycloadditions of allylic carbonates with arylazosulfones were developed for the synthesis of pyrazole derivatives. The reactions proceed smoothly under mild conditions to generate corresponding annulation products in good to excellent yields.