Steven, Alan published the artcileUse of a Curtius Rearrangement as Part of the Multikilogram Manufacture of a Pyrazine Building Block, Computed Properties of 5098-14-6, the publication is Organic Process Research & Development (2018), 22(1), 77-81, database is CAplus.
2-Amino-5-methylpyrazine I was prepared on multikilogram scale as an intermediate in the preparation of a glucokinase activator using the Curtius rearrangement of an acyl azide derived from 5-methyl-2-pyrazinecarboxylic acid as the key step. The formation of an acyl azide for the Curtius rearrangement required a process safety control strategy to be put in place. The process developed was used to successfully deliver multikilogram quantities of I in an overall yield of 68% starting from 5-methylpyrazine-2-carboxylic acid.
Organic Process Research & Development published new progress about 5098-14-6. 5098-14-6 belongs to nitriles-buliding-blocks, auxiliary class Nitrile,Salt,Sulfonic acid,Amine,Benzene, name is 2-Aminomalononitrile 4-methylbenzenesulfonate, and the molecular formula is C3H12Cl2N2, Computed Properties of 5098-14-6.
Referemce:
https://en.wikipedia.org/wiki/Nitrile,
Nitriles – Chemistry LibreTexts