RATE ACCELERATING POLYMERIC COFACTORS IN THE HOMOGENEOUS HYDROGENATION OF ALKENES
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The novel use of polymeric reagents as selective phosphine absorbers in a homogeneous catalysis is presented. Silver(I) P-toluene sulfonate (A) is shown to absorb tertiary phosphines from organic solution and to restore PPh3-inhibited homogeneous hydrogenation of alkenes by RI1CIL3 (L=PPh3) to a non-inhibited rate. Treatment of RhClL3 with ethylene in presence of A followed by addition of a second alkene and removal of ethylene under reduced pressure leads to an increased rate of hydrogenation for several alkenes. 1981, Taylor & Francis Group, LLC. All rights reserved.