Site-Selective C-H Alkylation of Piperazine Substrates via Organic Photoredox Catalysis was written by McManus, Joshua B.;Onuska, Nicholas P. R.;Jeffreys, Matthew S.;Goodwin, Nicole C.;Nicewicz, David A.. And the article was included in Organic Letters in 2020.Formula: C13H20N4O2 This article mentions the following:
Substituted piperazines such as I were prepared by C-H alkylation of piperazines such as tert-Bu 4-benzoyl-1-piperazinecarboxylate with electron-deficient alkenes such as PhCH:C(CN)2 under blue LED irradiation in the presence of a diarylacridinium salt as a photoredox catalyst. The regioselectivity of the photoredox alkylation reactions was correlated to the difference between the calculated electron populations at the nitrogen atoms of the neutral compounds and the calculated electron populations at the nitrogen atoms of the radical cations. In the experiment, the researchers used many compounds, for example, tert-Butyl 4-(pyrimidin-2-yl)piperazine-1-carboxylate (cas: 780705-64-8Formula: C13H20N4O2).
tert-Butyl 4-(pyrimidin-2-yl)piperazine-1-carboxylate (cas: 780705-64-8) belongs to piperazine derivatives. Piperazine is a fairly basic compound and is an amine solvent. Intermediate for a wide range of pharmaceuticals, polymers, dyes, corrosion inhibitors, rubber accelerators and surfactants.Formula: C13H20N4O2
Referemce:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics