Hultzsch, Kai C.; Jernelius, Jesper A.; Hoveyda, Amir H.; Schrock, Richard R. published an article on February 15 ,2002. The article was titled 《The first polymer-supported and recyclable chiral catalyst for enantioselective olefin metathesis》, and you may find the article in Angewandte Chemie, International Edition.Quality Control of (R)-3,3′-Di-tert-butyl-5,5′,6,6′-tetramethylbiphenyl-2,2′-diol The information in the text is summarized as follows:
The synthesis of polymer-bound [(1R)-3,3′-Bis(1,1-dimethylethyl)-6,6′-tetramethyl[1,1′-biphenyl]-2,2′-diolato(2-)-κO,κO’][2,6-bis(1-methylethyl)benzenaminato(2-)](2-methyl-2-phenylpropylidene)molybdenum (I) from [2,6-bis(1-methylethyl)benzenaminato(2-)][1,2-di(methoxy-κO)ethane](2-methyl-2-phenylpropylidene)bis(trifluoromethanesulfonato-κO)molybdenum and a chiral polymer-bound [1,1′-biphenyl]-2,2′-diol precursor was reported. The activity of the polymer-bound catalyst I was compared to un-supported [(1R)-3,3′-bis(1,1-dimethylethyl)-5,5′,6,6′-tetramethyl[1,1′-biphenyl]-2,2′-diolato(2-)-κO,κO’][2,6-bis(1-methylethyl)benzenaminato(2-)](2-methyl-2-phenylpropylidene)molybdenum in metathesis reactions of several alkenes. After reading the article, we found that the author used (R)-3,3′-Di-tert-butyl-5,5′,6,6′-tetramethylbiphenyl-2,2′-diol(cas: 329735-68-4Quality Control of (R)-3,3′-Di-tert-butyl-5,5′,6,6′-tetramethylbiphenyl-2,2′-diol)
(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.Quality Control of (R)-3,3′-Di-tert-butyl-5,5′,6,6′-tetramethylbiphenyl-2,2′-diol 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