Reference of 4-(Piperazin-1-yl)phenol. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: 4-(Piperazin-1-yl)phenol, is researched, Molecular C10H14N2O, CAS is 56621-48-8, about Synthesis and bioevaluation of 4,5,6,7-tetrahydrobenzo[d]isoxazole derivatives as melanogenesis inhibitors. Author is Song, Jiho; Lee, Kiho; Kim, Doran; Kim, Jongmin; Lee, Seul; Shin, Jun Seob; Kim, Dong-Seok; Min, Kyung Hoon.
A series of 4,5,6,7-tetrahydrobenzo[d]isoxazole derivatives I [R1 = H, tert-butyl; R2 = 4-OH, 4-OMe, 2-OMe, 4-CF3, 4-F] was prepared via amide coupling of arylpiperazines with corresponding 4,5,6,7-tetrahydrobenzo[d]isoxazole carboxylic acid chlorides. Addnl., 4,5,6,7-tetrahydrobenzo[d]isoxazole derivative I [R1 = H; R2 = 4-OEt] was synthesized by O-alkylation of compound I [R1 = H; R2 = 4-OH] using iodoethane. The synthesized compounds were tested for their melanogenesis inhibiting activity through potential down-regulation of tyrosinase expression. Among the tested compounds, compounds I [R1 = H; R2 = 4-OMe, 2-OMe, 4-CF3] displayed better melanogenesis inhibiting activity than well-known compounds Arbutin and Kojic acid, without intrinsic cytotoxicity.
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