Xiong, Wu-Lin published the artcileConstruction of a Clock Catalytic System: Highly Efficient and Self-Indicating Synthesis of Benzoheterocycles at Ambient Temperature, Category: imidazoles-derivatives, the publication is Asian Journal of Organic Chemistry (2021), 10(12), 3321-3327, database is CAplus.
Inspired by the mechanism of the clock reaction, a novel phosphomolybdenum blue (PMB) clock catalytic system was constructed for a highly efficient synthesis of benzimidazoles and benzothiazoles simply at ambient temperature The PMB clock catalytic system exhibited a sharp decoloration event to announce the depletion of the intermediate constraint, making this synthetic approach self-indicating and TLC-free. XPS and 31P NMR anal. of PMB catalyst showed that only two Mo6+ atoms were reduced to Mo5+ atoms in the Keggin structure due to the moderate reducibility of benzimidazoline and benzothiazoline intermediates. Thus,the active Keggin-type POM cluster could be well maintained in DMSO during the redox cycling of phosphomolybdic acid (PMA) and PMB. The 1H NMR tracing experiment not only confirmed the proposed reaction mechanism but also showed that PMB exerts Lewis acid catalytic activity at the early phase of the reaction other than the expected redox catalytic activity.
Asian Journal of Organic Chemistry published new progress about 2622-67-5. 2622-67-5 belongs to imidazoles-derivatives, auxiliary class Benzimidazole,Benzene,Benzimidazole, name is 1,2-Diphenyl-1H-benzo[d]imidazole, and the molecular formula is C18H12ClNO, Category: imidazoles-derivatives.
Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem