1229705-38-7Relevant academic research and scientific papers
Carbamate Synthesis Using a Shelf-Stable and Renewable C1 Reactant
Dobi, Zoltán,Reddy, B. Narendraprasad,Renders, Evelien,Van Raemdonck, Laurent,Mensch, Carl,De Smet, Gilles,Chen, Chen,Bheeter, Charles,Sergeyev, Sergey,Herrebout, Wouter A.,Maes, Bert U. W.
, p. 3103 - 3114 (2019/06/24)
4-Propylcatechol carbonate is a shelf-stable, renewable C1 reactant. It is easily prepared from renewable 4-propylcatechol (derived from wood) and dimethyl carbonate (derived from CO2) using a reactive distillation system. In this work, the 4-propylcatechol carbonate is used for the two-step synthesis of carbamates under mild reaction conditions. In the first step, 4-propylcatechol carbonate is treated with an alcohol at 50–80 °C in the presence of a Lewis acid catalyst, such as Zn(OAc)2?2 H2O. With liquid alcohols, no solvent is used and with solid alcohols 2-methyltetrahydrofuran is used as solvent. In the second step, the alkyl 2-hydroxy-propylphenyl carbonate intermediates obtained react with amines at room temperature in 2-methyltetrahydrofuran, forming the target carbamates and the byproduct 4-propylcatechol, which can be recycled into a carbonate reactant.
Azetidine derivatives as novel γ-aminobutyric acid uptake inhibitors: Synthesis, biological evaluation, and structure-activity relationship
Faust, Mark R.,H?fner, Georg,Pabel, J?rg,Wanner, Klaus T.
experimental part, p. 2453 - 2466 (2010/07/08)
In this study azetidine derivatives representing conformationally constrained GABA or β-alanine analogs were evaluated for their potency as GABA-uptake inhibitors. The study comprised derivatives substituted in 2- as well as in 3-position with either an acetic acid moiety or a carboxylic acid function. In addition, azetidine derivatives bearing a tetrazole ring as a bioisosteric substitute for a carboxylic acid group were included. 3-Hydroxy-3-(4-methoxyphenyl)azetidine derivatives were explored as analogs of the known GABA-uptake inhibitor NNC-05-2045 exhibiting an azetidine ring instead of a piperidine ring present in the latter. Both, N-unsubstituted compounds as well as their N-alkylated lipophilic derivatives, were biologically evaluated for their affinity to the GAT-1 and GAT-3 transporters. Azetidin-2-ylacetic acid derivatives provided with a 4,4-diphenylbutenyl or 4,4-bis(3-methyl-2-thienyl)butenyl moiety as lipophilic residue were found to exhibit the highest potency at GAT-1 with IC50 values of 2.83 ± 0.67 μM and 2.01 ± 0.77 μM, respectively. The most potent GAT-3 inhibitor among these compounds appeared to be the β-alanine analog 1-{2-[tris(4-methoxyphenyl)methoxy]ethyl}azetidine-3-carboxylic acid (12d) displaying an IC50 value of 15.3 ± 4.5 μM. Whereas the tetrazole derivatives showed no potency as GABA-uptake inhibitors, the 3-hydroxy-3-(4-methoxyphenyl)azetidine derivatives exhibited moderate affinity to GAT-1 (compound 18b: IC50 = 26.6 ± 3.3 μM) and to GAT-3 (compound 18e: IC50 = 31.0 ± 4.7 μM).
