33143-80-5Relevant articles and documents
Ammonium Chloride-Promoted Rapid Synthesis of Monosubstituted Ureas under Microwave Irradiation
Lan, Chunling Blue,Auclair, Karine
supporting information, p. 5135 - 5146 (2021/10/19)
Monosubstituted ureas are important scaffolds in organic chemistry. They appear in various biologically active compounds and serve as versatile precursors in synthesis. Monosubstituted ureas were originally prepared using toxic and hazardous phosgene equivalents. Modern methods include transamidation of urea and nucleophilic addition to cyanate salts, both of which suffer from a narrow substrate scope due to the need for a strong acid and prolonged reaction times. We hereby report that ammonium chloride can promote the reaction between amines and potassium cyanate to generate monosubstituted ureas in water. This method proceeds rapidly under microwave irradiation and tolerates a broad range of functional groups. Unlike previous strategies, it is compatible with other nucleophiles, acid-labile moieties, and most of the common protecting groups. The products precipitate out of solution, allowing facile isolation without column chromatography.
Synthesis of alkynylated 1,2,4-oxadiazole/1,2,3-1H-triazole glycoconjugates: Discovering new compounds for use in chemotherapy against lung carcinoma and Mycobacterium tuberculosis
Melo de Oliveira, Valentina Nascimento,Flávia do Amaral Moura, Cybele,Peixoto, Aline dos Santos,Gon?alves Ferreira, Vanessa Pinheiro,Araújo, Héverton Mendes,Lapa Montenegro Pimentel, Lilian Maria,Pessoa, Claudia do ó,Nicolete, Roberto,Versiani dos Anjos, Janaína,Sharma, Prem Prakash,Rathi, Brijesh,Pena, Lindomar José,Rollin, Patrick,Tatibou?t, Arnaud,Nascimento de Oliveira, Ronaldo
, (2021/06/07)
A total of forty-three compounds were synthesized, including thirty-two new ones. Among those compounds, seventeen were selected and tested on human tumor cell lines: PC-3 (prostate adenocarcinoma), HCT-116 (colorectal tumor), NCIH-460 (lung carcinoma), S
Amidine-and amidoxime-substituted heterocycles: Synthesis, antiproliferative evaluations and dna binding
Grb?i?, Petra,Kraljevi? Paveli?, Sandra,Mara?i?, Silvija,Paveli?, Kre?imir,Radi? Stojkovi?, Marijana,Rai?-Mali?, Silvana,Sedi?, Mirela,Shammugam, Suresh
, (2021/12/01)
The novel 1,2,3-triazolyl-appended N-and O-heterocycles containing amidine 4–11 and amidoxime 12–22 moiety were prepared and evaluated for their antiproliferative activities in vitro. Among the series of amidine-substituted heterocycles, aromatic diamidin