Petrov, A. D. published the artcileCondensation of pinacol dihalides with allyl chloride in the presence of magnesium, SDS of cas: 594-81-0, the publication is Zhurnal Obshchei Khimii (1955), 1982-6, database is CAplus.
A mixture of 100 g. (EtMeCCl)2 and 152 g. CH2:CHCH2Cl was added dropwise to 48 g. Mg (for technique cf. C.A. 47, 3218d), with cooling after the reaction had started; after treatment with aqueous NH4Cl and distillation of the product from Na, there was obtained a mixture of 2 products, resolved into 10% (CH2:CHCH2CMeEt)2, b760 210-15°, nD20 1.4620, d20 0.818, which hydrogenated over Raney Ni at 190° and 200 atm. H to the corresponding saturated compound, b. 216-18°, f.p. below -80°, nD20 1.4440, d20 0.798. The condensation also gave 38% C11 hydrocarbon, b760 178-80°, nD20 1.4560, d20 0.802, which with 1% KMnO4 gave a ketone, identified as MeCOEt, and AcCHMeCH2CO2H, identified as the Ag salt; thus the 2nd product is probably CH2:CHCH2CHMeCMe:CMeEt, formed through allylic rearrangement of the starting material. (Me2CBr)2, decompose 168-9°, prepared from the glycol and dry HBr, was condensed similarly with 200% excess CH2:CHCH2Cl with Mg in Et2O at -20°, yielding a mixture of (CH2:CHCH2CMe2)2 and [Me2C(OEt)]2, b. 145-7°, which after hydrogenation over Raney Ni gave a 12:88 mixture of a hydrocarbon C12H26 and the above diether, which could not be separated
Zhurnal Obshchei Khimii 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, SDS of cas: 594-81-0.
Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary