HOMOGENEOUS CATALYTIC-HYDROGENATION .5. REGIOSELECTIVE REDUCTIONS OF MONONUCLEAR AND POLYNUCLEAR HETEROAROMATIC MODEL COAL COMPOUNDS USING THE (ETA-5-PENTAMETHYLCYCLOPENTADIENYL)RHODIUM TRIS(ACETONITRILE) DICATION AS THE CATALYST PRECURSOR

被引:58
作者
FISH, RH
BARALT, E
SMITH, SJ
机构
[1] Lawrence Berkeley Laboratory, University of California, Berkeley
关键词
D O I
10.1021/om00047a028
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The regioselective hydrogenation of representative mono- and polynuclear heteroaromatic nitrogen and sulfur model coal compounds such as 2-methylpyridine (1), quinoline (2), 2-methylquinoline (3), 5,6- and 7,8-benzoquinolines (4 and 5), acridine (6), and benzothiophene (7) was studied with the dicationic complex (eta-5-pentamethylcyclopentadienyl)rhodium tris(acetonitrile) (Cp * Rh(CH3CN)3(2+)) as the catalyst precursor. The order of relative rates as a function of structure was found to be 5 > > > 6 > 2 > 4 > 3 > 7 > > 1. Replacement of H2 with D2 provided information on several of the mechanistic aspects of these selective hydrogenation reactions with compounds 2 and 7 as examples.
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页码:54 / 56
页数:3
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