In 2013,Chemistry – A European Journal included an article by Ogasawara, Masamichi; Arae, Sachie; Watanabe, Susumu; Nakajima, Kiyohiko; Takahashi, Tamotsu. Category: alcohols-buliding-blocks. The article was titled 《Kinetic Resolution of Planar-Chiral 1,2-Disubstituted Ferrocenes by Molybdenum-Catalyzed Asymmetric Intraannular Ring-Closing Metathesis》. The information in the text is summarized as follows:
The kinetic resolution of racemic planar-chiral 1,2-disubstituted ferrocene derivatives, e.g., rac-1-allyl-2-methallylferrocene (1b) was accomplished through a Mo catalyzed asym. intrannular ring-closing metathesis reaction. E.g., rac-1b reacted with the precatalysts, Mo(:NC6H3-2,6-iPr2)(:CHCMe2Ph)(NC4H2)2/(R)-3,3′-(2,4,6-iPr3C6H2)2-binaphthol (5 mol%) in dry benzene at room temperature to give (S)-1b in 37% yield (96% ee) and (+)(η5-cyclopentadienyl)(η5-4,7-dihydro-5-methylindenyl)iron(II) in 60% yield (72% ee). In the experimental materials used by the author, we found (R)-3,3′-Di-tert-butyl-5,5′,6,6′-tetramethylbiphenyl-2,2′-diol(cas: 329735-68-4Category: alcohols-buliding-blocks)
(R)-3,3′-Di-tert-butyl-5,5′,6,6′-tetramethylbiphenyl-2,2′-diol(cas: 329735-68-4) belongs to phenols. Phenols are more acidic than typical alcohols.Category: alcohols-buliding-blocks The acidity of the hydroxyl group in phenols is commonly intermediate between that of aliphatic alcohols and carboxylic acids (their pKa is usually between 10 and 12).
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts