Tang, Cheng-Ke published the artcileCombining Organocatalysis and Iodine Catalysis: One-Pot Sequential Catalytic Synthesis of Chiral Spirodihydrobenzofuran Pyrazolones and Spirodihydrobenzofuran Oxindoles, Formula: C10H9ClN2O, the publication is Organic Letters (2018), 20(18), 5840-5844, database is CAplus and MEDLINE.
O-Hydroxystyrenes such as (E)-2-HOC6H4CH:CHNO2 underwent diastereoselective and enantioselective oxidative spirocyclization reactions (via sequential Michael addition, iodination, and cyclization reactions) with pyrazolones and N-Boc oxindoles in the presence of a nonracemic squaramide and a nonracemic alkaloid-derived thiourea to give spirobenzofuranpyrazolones such as I and spirobenzofuranoxindoles such as II, resp.
Organic Letters 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 CBF6K, Formula: C10H9ClN2O.
Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics