HPLC of Formula: 109-01-3In 2020 ,《Metal-Free Synthesis of Thermally Stable Fluorescent p-Terphenyls by Ring Transformation of 2H-Pyran-2-ones》 was published in ChemistrySelect. The article was written by Chandrasekar, Subashini; Singh, Fateh V.. The article contains the following contents:
A metal-free approach for the synthesis of p-terphenyls I (Y = piperidin-1-yl, N,N-dimethylamin-1-yl, 4-methylpiperidin-1-yl, etc.) and cyclic p-terphenyls II and III is described via carbanion induced ring transformation reaction of 6-biphenyl-2H-pyran-2-ones IV with malononitrile, cyclohexanone and 1,4-dioxaspiro[4.5]decan-8-one resp. Addnl., the base-mediated ring transformation reactions were working smoothly under mild reaction conditions and ring transformation products I, II and III were isolated in good to excellent yields. The synthetic approach provides the flexibility of introducing of both electron-withdrawing and -donating functionalities in p-terphenyl architecture. Moreover, the photo phys. properties of compounds I, II and III were analyzed using UV-visible and Fluorescence Spectroscopy. The p-Terphenyls I (Y = 4-phenylpiperazin-1-yl) showed cyan fluorescence in chloroform (λmax (em): 508 nm) and acetonitrile (λmax (em): 420 nm) while cyclic p-terphenyl II (Y = 4-phenylpiperazin-1-yl) showed blue fluorescence in chloroform and 1,4-dioxane (λmax (em): 470 nm). Similarly, compound III (Y = 4-phenylpiperazin-1-yl) showed blue fluorescence in chloroform (λmax (em): 468 nm) and 1,4-dioxane (λmax (em): 473 nm). Addnl., the thermal stability of synthesized cyclic p-terphenyls III (Y = 4-methylpiperidin-1-yl, N,N-dipropylamin-1-yl, piperidin-1-yl) were also studied using TG and DTA techniques. After reading the article, we found that the author used 1-Methylpiperazine(cas: 109-01-3HPLC of Formula: 109-01-3)
1-Methylpiperazine(cas: 109-01-3) can be used as mimic template in the preparation of molecularly imprinted microspheres (MIMs). It was also used to prepare the difunctional strong anion-exchange stationary phase from a 1,4-diazacyclohexane derivative..HPLC of Formula: 109-01-3
Referemce:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics