Mrachkovskaya, L. B.; Anisimova, O. S.; Turchin, K. F.; Yakhontov, L. N. published an article in 1976, the title of the article was Formation of the bis(N-methylpiperazide) of monothiooxalic acid from 3-(N-methylpiperazinyl)propionic acid under conditions of the Zelinsky reaction.Formula: C8H18Cl2N2O2 And the article contains the following content:
The title compound I was obtained from piperazinepropionic acid (II) by boiling 2 hr with SOCl2, 2 hr with Br-CHCl3, and 5 hr with EtOH. The experimental process involved the reaction of 3-(4-Methylpiperazin-1-yl)propanoic acid dihydrochloride(cas: 59695-29-3).Formula: C8H18Cl2N2O2
The Article related to piperazine thiooxalylbismethyl, Heterocyclic Compounds (More Than One Hetero Atom): Pyrazines and Quinoxalines and other aspects.Formula: C8H18Cl2N2O2
Referemce:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics