Mar 4, 2021
azo-dye
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azo-dye
Continuous-Flow Diazotization
Continuous-Flow Diazotization for Efficient Synthesis of Methyl 2-(Chlorosulfonyl)benzoate: An Example of Inhibiting Parallel Side Reactions Zhiqun Yu†, Hei Dong†, Xiaoxuan Xie†, Jiming Liu‡, and Weike Su*†‡ † National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green…
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Before we start with the azo coupling, the diazotization needs to come first.
This reddish-brown color is the best indication for that the diazotization with the expected white crystalline product did turned into something really different, something what was not expected.