El Ali, Bassam published the artcileRh6(CO)16-H3PW12O40-catalyzed one pot hydroformylation-cyclotrimerization of cyclohexene and cyclopentene to 2,4,6-trisubstituted 1,3,5-trioxanes, Recommanded Product: Pyridine-3-sulfonic acid, the publication is Journal of Molecular Catalysis A: Chemical (2003), 203(1-2), 53-58, database is CAplus.
One-pot hydroformylation-cyclotrimerization of cyclopentene and cyclohexene was selectively catalyzed by Rh6(CO)16 and H3PW12O40·xH2O (HPA-W12) in THF at 40 atm (CO/H2 = 1/1) and afforded 2,4,6-tris(cycloalkyl)-1,3,5-trioxanes as major products along with the corresponding aldehydes.
Journal of Molecular Catalysis A: Chemical published new progress about 636-73-7. 636-73-7 belongs to pyridine-derivatives, auxiliary class Pyridine,Sulfonic acid, name is Pyridine-3-sulfonic acid, and the molecular formula is C5H5NO3S, Recommanded Product: Pyridine-3-sulfonic acid.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem