157735-68-7Relevant academic research and scientific papers
ORGANOSULPHUR PHOSPHORUS ACID COMPOUNDS. PART 4. FLUOROBENZYLPHOSPHONO-SULPHONIC ACIDS
Montoneri, E.,Savarino, P.,Viscardi, G.,Gallazzi, M. C.
, p. 145 - 156 (2007/10/02)
Four new organosulphur phosphorus acid compounds have been obtained by sulphonation with liquid SO3: 2-fluorobenzylphosphonic and 4-fluorobenzylphosphonic acids gave 2-fluorobenzylphosphono-5-sulphonic and 4-fluorobenzylphosphono-3-sulphonic acids respectively, in nearly quantitative yields; 3-fluorobenzylphosphonic acid gave 3-fluorobenzylphosphono-6-sulphonic acid (85percent) and 3-fluorobenzylphosphono-4-sulphonic acid (15percent).Product structures are based on 13C magnetic resonance data.The entry of the SO3H group into the aromatic ring seems mainly ruled by the fluorinesubstituent.Key words: Sulphonation; fluorobenzylphosphonic acid; fluorobenzylphosphono-sulphonic acid.
