Gawali, Suhas Shahaji published the artcileIron-catalyzed regioselective cyclotrimerization of alkynes to benzenes, Application of 2,6-Bis((di-tert-butylphosphino)methyl)pyridine, the publication is Journal of Organometallic Chemistry (2019), 139-149, database is CAplus.
We report the synthesis and characterization of simple di(aminomethyl)pyridine ligated iron-pincer complexes, which catalyzed the regioselective [2+2+2]-cyclotrimerization of terminal aryl and alkyl alkynes to provide the 1,2,4-trisubstituted benzene mols. Interestingly, internal alkynes also exhibited similar cyclization and resulted in hexa-substituted benzene compounds Increased steric bulk on pincer ligands diminished the selectivity for cycloaddition Cyclotrimerization reactions proceeded at room temperature upon activation of catalyst by a Grignard reagent. EPR studies indicated thermally induced spin crossover effect in catalyst.
Journal of Organometallic Chemistry published new progress about 338800-13-8. 338800-13-8 belongs to pyridine-derivatives, auxiliary class Bis-phosphine Ligands, name is 2,6-Bis((di-tert-butylphosphino)methyl)pyridine, and the molecular formula is C23H43NP2, Application of 2,6-Bis((di-tert-butylphosphino)methyl)pyridine.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem