An article KF-Al(2)O(3)as a Base Heterogeneous Catalyst for the Synthesis of 2-Substituted Benzoxazoles and Benzothiazoles under Mild Reaction Conditions at Room Temperature WOS:000561108100009 published article about ONE-POT SYNTHESIS; EFFICIENT CATALYST; BIOLOGICAL EVALUATION; BENZIMIDAZOLES; DERIVATIVES; KF/AL2O3; AZOLES; NANOPARTICLES; CYCLIZATIONS; STABILITY in [Bahadorikhalili, Saeed; Sardarian, Ali Reza] Shiraz Univ, Dept Chem, Coll Sci, Shiraz 71454, Iran in 2020, Cited 46. Recommanded Product: Benzoic anhydride. The Name is Benzoic anhydride. Through research, I have a further understanding and discovery of 93-97-0
A convenient synthesis of 2-substituted benzothiazoles and benzoxazoles from the reactiono-aminophenol oro-aminothiophenol with acyl chlorides or acid anhydrides has been accomplished. The various carboxylic acid derivatives were reacted witho-aminophenol oro-aminothiophenol in the presence of KF-Al(2)O(3)as a base heterogeneous catalyst to form correspondence benzothiazoles and benzoxazoles in high yields, and the catalyst showed a good recyclability.
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Reference:
Isothiazole – Wikipedia,
,Isothiazole – ScienceDirect.com