Regioselective Hydroesterification of Styrene Catalyzed by PdCl2-NiCl2-PPh3/PVP

Abstract

Abstract: Polymer-supported bimetallic system of PdCl₂-4NiCl₂-PPH₃/PVP [PVP= poly(N-vinyl-2-pyrrolidone)] provided an almost regiospecific conversion of styrene to thebranched methyl 2-propionate at a high conversion.Typical reaction conditions are: 353 K,2.1 MPa of COpressure (gauge pressure), 10h; styrene (1 mmol); methanol (0.8 mL) ;benzene (10 mL); PdCl₂/PVP(0.04 mmol Pd, N/Pd= 20 in molar ratio); n (Pd): n(Ni): n(PPh₃) = 1: 4:1.Aremarkable synergic effect of bimetallic catalyst can be observed.Effects of PVP, amount of triphenylphosphine and temperature on the reaction were studied.The system of PdCl₂-4NiCl₂-PPh₃/PVPgave 100% conversion of styrene and 99% selectivityto the branched chain ester under the typical reaction conditions.

Key words: PdCl₂-NiCl₂-PPh₃/PVP bimetallic catalyst system, Hydroesterification, Regioselectivity, Styrene

CLC Number:

O643.11

TrendMD:

WAN Bo-Shun, LIAO Shi-Jian, XU Yun, YU Dao-Rong. Regioselective Hydroesterification of Styrene Catalyzed by PdCl₂-NiCl₂-PPh₃/PVP[J]. Chem. J. Chinese Universities, 1997, 18(11): 1866.

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Regioselective Hydroesterification of Styrene Catalyzed by PdCl₂-NiCl₂-PPh₃/PVP

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