Yoshizawa, Taku et al. published their research in Jin to Toseki in 2013 | CAS: 2192-20-3

2-(2-(4-((4-Chlorophenyl)(phenyl)methyl)piperazin-1-yl)ethoxy)ethanol dihydrochloride (cas: 2192-20-3) belongs to piperazine derivatives. Simple N-substituted piperazines have been found in many drug molecules. Piperazine is formed as a co-product in the ammoniation of 1,2-dichloroethane or ethanolamine. These are the only routes to the chemical used commercially.Application In Synthesis of 2-(2-(4-((4-Chlorophenyl)(phenyl)methyl)piperazin-1-yl)ethoxy)ethanol dihydrochloride

Nalfurafine hydrochloride enabled to reduce dosage or discontinue conventional treatment for uremic pruritus was written by Yoshizawa, Taku;Kumagai, Junko;Takahashi, Naoko;Tsuchiya, Shinichiro. And the article was included in Jin to Toseki in 2013.Application In Synthesis of 2-(2-(4-((4-Chlorophenyl)(phenyl)methyl)piperazin-1-yl)ethoxy)ethanol dihydrochloride This article mentions the following:

In this paper, nalfurafine hydrochloride enabled to reduce dosage or discontinue conventional treatment for uremic pruritus was reported. In the experiment, the researchers used many compounds, for example, 2-(2-(4-((4-Chlorophenyl)(phenyl)methyl)piperazin-1-yl)ethoxy)ethanol dihydrochloride (cas: 2192-20-3Application In Synthesis of 2-(2-(4-((4-Chlorophenyl)(phenyl)methyl)piperazin-1-yl)ethoxy)ethanol dihydrochloride).

2-(2-(4-((4-Chlorophenyl)(phenyl)methyl)piperazin-1-yl)ethoxy)ethanol dihydrochloride (cas: 2192-20-3) belongs to piperazine derivatives. Simple N-substituted piperazines have been found in many drug molecules. Piperazine is formed as a co-product in the ammoniation of 1,2-dichloroethane or ethanolamine. These are the only routes to the chemical used commercially.Application In Synthesis of 2-(2-(4-((4-Chlorophenyl)(phenyl)methyl)piperazin-1-yl)ethoxy)ethanol dihydrochloride

Referemce:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics