Chu, Edith Ju-Hwa published the artcileSymmetrical diaryldialkylethanediols. I. 2,3-Diphenyl-2,3-butanediol, Application of 2,3-Dibromo-2,3-dimethylbutane, the publication is Journal of the Chinese Chemical Society (Peking) (1942), 190-5, database is CAplus.
Bz2 (0.0642 g. mol.) was added to 100 cc. of anhydrous Et2O containing the Grignard reagent prepared from 0.37 g. mol. of Mg and 0.264 g. mol. of MeI. After the vigorous reaction had subsided, the mixture was refluxed for 3 hrs. and then hydrolyzed with 40 g. of NH4Cl in 200 cc. cold H2O. The crude 2,3-diphenyl-2,3-butanediol (I) was extracted from the reaction mixture with Et2O and C6H6 and crystallized from alc., m. 118° (52% yield). Distillation of the mother liquor yielded α-methyl-α-phenylpropiophenone (II), m. 45° b. 307°. An alternative method for preparing I was to dissolve 0.036 g. mol. of PhCOMe (III) in 20 cc. of iso-PrOH and expose to sunlight for 1 month. After removal of the solvent, a quant. yield of a mixture of the high-and low-melting modifications of I was obtained, m. 84° (not sharp). A separation of the modifications was effected by fractional crystallization from CCl4, the high-melting modification being less soluble Poor yields of I were obtained when III was reduced with Na or Mg amalgam. I (0.0144 g. mol.) was boiled with 5 cc. of HOAc containing a few crystals of iodine for 1 hr. The reaction mixture was poured into aqueous NaHSO3 and extracted with Et2O. From the Et2O, II was obtained in 89% yield, m. 41-2° b610 300-1°. Oxime, m. 151.2-2.2° (from alc.). I (0.0023 g. mol.) refluxed with 5 cc. of Ac2O for 1.5 hrs. yielded a mixture of II and unreacted I.
Journal of the Chinese Chemical Society (Peking) published new progress about 594-81-0. 594-81-0 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 2,3-Dibromo-2,3-dimethylbutane, and the molecular formula is C6H12Br2, Application of 2,3-Dibromo-2,3-dimethylbutane.
Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary