On August 18, 1975, there was a patent about cycloaddition reaction.Recommanded Product: 53788-12-8 The title of the patent was p-Dithiino[2,3-c]pyrroles. And the patent contained the following:
Dithiinopyrroles I (R = OH, OMe, R1 = H; R = Me, R1 = H, Me, Cl, OMe; R = H, R1 = Cl, Me, OMe) were prepared by treating the 2-aminonaphthyridines with 5,6-dihydro-1,4-dithiin-2,3-dicarboxylic anhydride, chlorinating when R1 = OH, reducing the dithiinopyrroledione to the monohydroxy derivative, and treating the latter with chlorocarbonylpiperazines. II (R2 = Et, CHMe2, allyl, CH2CH2OH) were similarly prepared The experimental process involved the reaction of 4-Ethyl-piperazine-1-carbonyl chloride(cas: 53788-12-8).Recommanded Product: 53788-12-8
The Article related to dithiinopyrrolol piperazinecarboxylate naphthyridinyl pyridinyl, piperazinecarboxylate naphthyridinyldithiinopyrrolyl, pyridinyldithiinopyrrolyl piperazinecarboxylate, aminonaphthyridine dithiindicarboxylate condensation and other aspects.Recommanded Product: 53788-12-8
Referemce:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics