Homogeneous Hydrogenation of Carbon-Nitrogen Double Bonds

HOMOGENEOUS HYDROGENATION OF CARBON-NITROGEN DOUBLE BONDS 

Although both [Rh(diene)P2] A type complexes, RhCl(PPh3)3, and catalysts prepared in from [Rh(diene)Cl]2 + PR3 are active in 

Reduction of Schiff-bases has been performed also with hydrogen transfer reactions catalyzed by RhCl(PPh3)3, RhCl(CO)(PPh3)2, and 

BAUNT HEIL, LASZLO MARKd, AND SZILARD t6R0S 

Ojima reported on the reduction of R R C=NR type Schiff bases by hydrosilylation with several catalysts. The reaction was also affected by the quality of hydrosilane. Using dihydrosilanes, which were found to be more active than monohydrosilanes and trihydrosilanes, the activity of the catalysts used decreased in the order RhCl(PPh3)3 Rh(CO)Cl-(PPh3)2 Py2RhCl(dmf)BH4 [Rh(HD)Cl]2 [Rh(COD)Cl]2 PdCb PdCl2(PPh3)2. 

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