Kelso, Robert G. published the artcileThe synthesis and properties of 1,1,2-trimethylcyclopropane, Category: bromides-buliding-blocks, the publication is Journal of the American Chemical Society (1952), 287-92, database is CAplus.
The reaction between Me2CBrCH2CHBrMe and Zn in aqueous PrOH at 0° carried out on a large scale permitted a thorough study of the reaction products. 1,1,2-Trimethylcyclopropane (I) comprised 68% of the hydrocarbon mixture obtained in 67% yield. Me2CHPr, CH2:CMePr (II), b760 61°, nD25 1.3916, and Me2C:CHEt, b760 64.5-5.5°, nD25 1.3987-1.3995, were also obtained; MeCH:CHCHMe2 was present in minor amount Com. Me2C(OH)CH2CH(OH)Me (18 moles) and PBr3 yielded 4112 g. crude Me2CBrCH2CHBrMe (III), b5 65-70°, nD20 1.496-1.498. (CMe:CH2)2, and anhydrous HBr yielded 70% H2CBrCHMeCBrMe2, b10 76°, and 30% (CBrMe)2, m. 160-4°, b10 78°. The product of AcII and Me2CH2CHO reduced over Raney Ni at 70° and 1500 lb./sq. in. yielded 13% MeCH(OH)CMe2CH2OH (IV), b20 121°, nD20 1.4408; IV with PBr3 at 0° yielded MeCHBrCH2CBrMe2. The following constants were determined: for I, f.p., -138.27°, m.p. -138.30°, b760 52.55, dt/dp 0.039, d420 0.6947, nD20 1.3864, dnD/dt 0.00054, nD25 1.3834; for CH2:CMeCHMe2, b760 55.6°, nD25 1.3874; for (Me2C:)2, b760 73.3°, nD25 1.4070.
Journal of the American Chemical Society 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, Category: bromides-buliding-blocks.
Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary