NDLI: Allylic substitution catalysed by silica-supported aqueous phase palladium(0) catalysts

Content Provider	Springer Nature Link
Author	dos Santos, Sylvia Quignard, Françoise Siu, Denis Choplin, Agnès
Copyright Year	2000
Abstract	The supported aqueous phase methodology was applied to the catalytic system Pd(OAc)$_{2}$/5TPPTS, a catalyst precursor of the Trost–Tsuji reaction. The characterization of the solid by $^{31}$P MAS NMR spectroscopy confirms the reduction by the phosphines of Pd(II) to Pd(0) as Pd(TPPTS)$_{3}$. The catalytic properties of this solid were determined for the allylic substitution of (E)-cinnamyl ethyl carbonate by nucleophiles such as ethyl acetoacetate, dimethyl malonate, morpholine, phenol and 2-mercaptopyridine and were compared to those of the same catalytic system in a biphasic water/nitrile medium. Having demonstrated the absence of palladium leaching and having solved the problem of water leaching from the solid into the organic solvent, the SAP Pd catalyst was engaged with success in a continuous flow experiment, demonstrating the possibility to reach a productivity superior to 2200 moles of carbonate selectively converted per mole of palladium within 11 h.
Starting Page	311
Ending Page	318
Page Count	8
File Format	PDF
ISSN	10225528
Journal	Topics in Catalysis
Volume Number	13
Issue Number	3
e-ISSN	15729028
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2000-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Physical Chemistry Industrial Chemistry/Chemical Engineering Catalysis Characterization and Evaluation Materials Pharmacy
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis

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