The author of 《Organocatalytic asymmetric synthesis of benzothiazolopyrimidines via a [4+2] cycloaddition of azlactones with 2-benzothiazolimines》 were Ke, Chaoqi; Liu, Zhenzhong; Ruan, Sai; Feng, Xiaoming; Liu, Xiaohua. And the article was published in Organic Chemistry Frontiers in 2021. Safety of 6-Chlorobenzothiazol-2-ylamine The author mentioned the following in the article:
An easily available L-proline-derived guanidine-amide were found to be efficient at catalyzing a [4+2] cycloaddition of azlactones with 2-benzothiazolimines by affording various benzothiazolopyrimidines bearing adjacent tertiary and quaternary stereogenic centers in excellent yields at 2 mol% loading. The diastereoisomers of the main adducts differed from those in a previous bifunctional organocatalytic system. In the experiment, the researchers used 6-Chlorobenzothiazol-2-ylamine(cas: 95-24-9Safety of 6-Chlorobenzothiazol-2-ylamine)
6-Chlorobenzothiazol-2-ylamine(cas: 95-24-9) belongs to thiazoles. Thiazoles are a class of five-membered rings containing nitrogen and sulfur with excellent antitumor, antiviral and antibiotic activities.Safety of 6-Chlorobenzothiazol-2-ylamineTheir presence in peptides or their ability to bind proteins, DNA and RNA has led to many synthetic studies and new applications.
Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica