Phosphonium acidic ionic liquid: an efficient and recyclable homogeneous catalyst for the synthesis of 2-arylbenzoxazoles, 2-arylbenzimidazoles and 2-arylbenzothiazoles was written by Nguyen, Quang The;Hang, Anh-Hung Thi;Nguyen, Thuy-Linh Ho;Chau, Duy-Khiem Nguyen;Tran, Phuong Hoang. And the article was included in RSC Advances in 2018.SDS of cas: 99586-31-9 This article mentions the following:
A highly efficient and green strategy was developed for the synthesis of 2-arylbenzoxazoles, 2-arylbenzimidazoles and 2-arylbenzothiazoles I [R = H, Me, Cl, NO2; Ar = Ph, 4-FC6H4, 4-pyridyl, etc.; X = NH, O, S] via phosphonium acidic ionic liquid catalyzed condensation of o-aminophenols, o-phenylenediamine and o-aminothiophenol, resp. with aryl aldehydes. Triphenyl(butyl-3-sulfonyl)phosphonium toluenesulfonate catalyst was easily obtained from cheap and available starting materials through a one-pot synthesis and its structure was identified by 1H NMR, 13C NMR, 31P NMR, and FT-IR techniques. Other properties including thermal stability and acidity were determined by TGA and Hammett acidity function method. The merits of this protocol were good yield, short reaction time, broad substrate scope, mild conditions and recyclability of catalyst. In the experiment, the researchers used many compounds, for example, 2-(3-Bromophenyl)benzo[d]oxazole (cas: 99586-31-9SDS of cas: 99586-31-9).
2-(3-Bromophenyl)benzo[d]oxazole (cas: 99586-31-9) belongs to benzoxazole derivatives. Benzoxazole derivatives have different biological activities. Due to its versatile biological properties, benzoxazole has been incorporated as an essential pharmacophore and substructure in many medicinal compounds.SDS of cas: 99586-31-9
Referemce:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem