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Hydrogenation of Aromatic Hydrocarbons by Al/Ti Reagents
Author(s) -
Yalpani Mohamed
Publication year - 1990
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19901230509
Subject(s) - chemistry , anthracene , naphthalene , pyrene , toluene , heptane , reagent , catalysis , benzene , atmospheric pressure , hydrogen , organic chemistry , bar (unit) , medicinal chemistry , hydrocarbon , oceanography , physics , meteorology , geology
Treatment of anthracene ( A ) with LiAlH 4 (LAH) at 150°C under atmospheric pressure gives 9,10‐di‐ and 1,2,3,4‐tetrahydroanthracene ( 2H‐A and 4H‐A ). At 160–200°C and under hydrogen pressure (10–90 bar) a number of simple and polycyclic aromatic compounds [e. g. toluene, naphthalene ( N ), A , phenanthene ( PH ), and pyrene ( PY )] are converted to fully or partially hydrogenated arenes. Addition of small amounts of TiCl 4 or TiCl 3 and the choice of solvents (heptane or glymes) have marked effects on the reaction. The pair triethylaluminium/TiCl 4 acts also as efficient hydrogenation catalyst.