《A Practical Method for the Large-Scale Preparation of [N,N’-Bis(3,5-di-tertbutylsalicylidene)-1,2-cyclohexanediaminato(2-)]manganese(III) chloride, a Highly Enantioselective Epoxidation Catalyst》 was written by Larrow, Jay F.; Jacobsen, Eric N.; Gao, Yun; Hong, Yaping; Nie, Xiaoyi; Zepp, Charles M.. SDS of cas: 153759-59-2 And the article was included in Journal of Organic Chemistry on April 8 ,1994. The article conveys some information:
An improved method is reported for the preparation of both enantiomers of N,N’-bis(3,5-di-tert-butylsalicylidene)-1,2-cyclohexanediaminomanganese (III) chloride, highly enantioselective catalysts for the epoxidation of a wide variety of olefins. The key improvements in the process were the application of the Duff reaction to the synthesis of 3,5-di-tert-butyl-2-hydroxylbenzaldehyde from the corresponding phenol, and a simplified procedure for the resolution of a racemic trans/cis mixture of 1,2-diaminocyclohexane. The Duff reaction is generally applicable to 2,4-disubstituted phenols, and the corresponding salicylaldehydes can be integrated into the described procedure to produce sterically and electronically modified asym. epoxidation catalysts. The synthesis eliminates the need for special handling of hazardous reagents and allows for the production on the multi-hundred kg scale. The experimental part of the paper was very detailed, including the reaction process of 5-(tert-Butyl)-4-hydroxyisophthalaldehyde(cas: 153759-59-2SDS of cas: 153759-59-2)
5-(tert-Butyl)-4-hydroxyisophthalaldehyde(cas: 153759-59-2) belongs to phenols.SDS of cas: 153759-59-2Deprotonation of a phenol forms a corresponding negative phenolate ion or phenoxide ion, and the corresponding salts are called phenolates or phenoxides (aryloxides according to the IUPAC Gold Book).
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