Peng, Yingyuan published the artcilePd-Catalyzed intramolecular C-H activation and C-S formation to synthesize pyrazolo[5,1-b]benzothiazoles without an additional oxidant, SDS of cas: 14580-22-4, the publication is Organic Chemistry Frontiers (2019), 6(18), 3234-3237, database is CAplus.
An efficient synthesis of pyrazolo[5,1-b]benzothiazole scaffold via Pd-catalyzed intramol. C-H activation and C-S formation was reported. By starting from easily available 1-phenyl-1H-pyrazole-5-thiol compounds, a series of substituted pyrazolo[5,1-b]benzothiazoles were obtained with moderate to good yields. Interestingly, this reaction didn’t need any addnl. oxidant and the reaction conditions were also suitable for the synthesis of imidazo[2,1-b]benzothiazole derivatives
Organic Chemistry Frontiers published new progress about 14580-22-4. 14580-22-4 belongs to pyrazoles-derivatives, auxiliary class Organic Pigment, name is 1-(2-Chlorophenyl)-3-methyl-5-pyrazolone, and the molecular formula is C10H9ClN2O, SDS of cas: 14580-22-4.
Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics