Brown, R. F. C.; Gardner, D. V.; McOmie, J. F. W.; Solly, R. K. published the artcile< New method for the synthesis of biphenylenes>, HPLC of Formula: 118-45-6, the main research area is .
The pyrolysis of phthalic anhydride (I) or substituted I gave biphenylene (II) or substituted II. The vapor of the compound was passed through a silica tube, in some cases packed with silica tubing or 1/4-in. porcelain Lessing rings, at 450-1100° at 0.1-2.0 mm. Given are starting material, product, and % yield: I, II, 17; 4-Cl derivative of I, 2,6-Cl2 derivative of II, 15; 4,5-Cl2 derivative of I, 2,3,6,7-Cl4 derivative of II, 6.5; 3,6-Cl2 derivative of I, 1,4,5,8-Cl4 derivative of II, 4; 3,4,5,6-Cl4 derivative of I, octachloro derivative of II, 26; 4,5-Me2 derivative of I, 2,3,6,7-Me4 derivative of II, 3. Pyrolysis of o-BrC6H4CO2H, diphenic acid, o-sulfobenzoic acid gave resp. a trace, 5%, and 5.5% II. No II or substituted II was formed in the pyrolysis of 4-PhCH2 derivative of I, 4-MeO derivative of I, o-ClC5H4CO2H, phthalimide (III), N-Me derivative of III, coumaran-2,3-dione, or disalicylide. Benzyne (IV) and substituted IV are probably intermediates in the reaction.
Chemical Communications (London) published new progress about 118-45-6. 118-45-6 belongs to class chlorides-buliding-blocks, and the molecular formula is C8H3ClO3, HPLC of Formula: 118-45-6.
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics