20816-71-1Relevant articles and documents
Haubold,Weidlein
, p. 171,174 (1974)
Ceron, P.,Finch, A.,Frey, J.,Kerrigan, J.,Parsons, T.,Urry, G.
, p. 6368 - 6371 (1959)
Synthesis of 1,2,3,4,5-Tetramethyl-1,4-diboracyclohexene-2 and Rearrangement to 1,2,3,4,5-Pentamethyl-2,3-dihydro-1,3-diborole
Uhm, J.-K.,Roemich, H.,Wadepohl, H.,Siebert, W.
, p. 306 - 308 (2007/10/02)
Reaction between Cl2AlCH2CH2AlCl2 and BCl3 leads to Cl2BCH2CH2BCl2, in which halogen exchange is achieved by BI3 to yield I2BCH2CH2BI2 (5).Redox reaction between butyne-2 and 5 results in the formation of 1,4-diiodo-2,3-dimethyl-1,4-diboracyclohexene-2 (1a) and iodine.Methylation of 1a with AlMe3 leads to the title compound 1d, established by 1H, 11B, 13C NMR.Heating of 1d in toluene at 160 deg C in sealed tube results in an intramolecular isomerization to give 1,2,3,4,5-pentamethyl-2,3-dihydro-1,3-diborole (2d) in 90percent yield. - Keywords: 1,2,3,4-Tetramethyl-1,4-diboracyclohexene-2, 1,2,3,4,5-Pentamethyl-2,3-dihydro-1,3-diborole