Nitroaldol reactions catalyzed by amine-MCM-41 hybrids was written by Wang, Qingqing;Shantz, Daniel F.. And the article was included in Journal of Catalysis in 2010.Product Details of 21867-64-1 This article mentions the following:
The catalytic properties of several amine-functionalized MCM-41 materials in a nitroaldol (Henry) reaction are reported. The work investigated the effects of organoamine type (primary, secondary, tertiary), amine d., and the presence of silanol groups on the catalytic activity and product selectivity. High selectivity to the nitro alc. product was achieved by introducing secondary and tertiary amine groups on the MCM-41 surface, while the nitroalkene is the dominant product for primary amines. Steric effects appear to be significant in determining the overall reactivity as the least sterically hindered amines are the most active. The capping of silanols with trimethylsilyl groups resulted in a reduction in catalytic activity for nearly all samples, indicating the importance of surface silanols and/or the surface polarity in the reaction. In the experiment, the researchers used many compounds, for example, 1-Propylpiperazine (cas: 21867-64-1Product Details of 21867-64-1).
1-Propylpiperazine (cas: 21867-64-1) belongs to piperazine derivatives. Piperazine was first introduced as an anthelmintic in 1953. Piperazine compounds mediate their anthelmintic action by generally paralyzing parasites, allowing the host body to easily remove or expel the invading organism. Although many piperazine derivatives occur naturally, piperazine itself can be synthesized by reacting alcoholic ammonia with 1,2-dichloroethane, by the action of sodium and ethylene glycol on ethylene diamine hydrochloride, or by reduction of pyrazine with sodium in ethanol.Product Details of 21867-64-1
Referemce:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics