Synthesis and catalytic properties of cationic palladium(II) and rhodium(I) complexes bearing diphosphinidinecyclobutene ligands

Rader S. Jensen; Kazutoshi Umeda; Masaaki Okazaki; Fumiyuki Ozawa; Masaaki Yoshifuji

doi:10.1016/j.jorganchem.2006.04.048

Synthesis and catalytic properties of cationic palladium(II) and rhodium(I) complexes bearing diphosphinidinecyclobutene ligands

Rader S. Jensen, Kazutoshi Umeda, Masaaki Okazaki, Fumiyuki Ozawa^*, Masaaki Yoshifuji

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

Cationic palladium(II) and rhodium(I) complexes bearing 1,2-diaryl-3,4-bis[(2,4,6-tri-t-butylphenyl)phosphinidene]cyclobutene ligands (DPCB-Y) were prepared and their structures and catalytic activity were examined (aryl = phenyl (DPCB), 4-methoxyphenyl (DPCB-OMe), 4-(trifluoromethyl)phenyl (DPCB-CF₃)). The palladium complexes [Pd(MeCN)₂(DPCB-Y)]X₂ (X = OTf, BF₄, BAr₄ (Ar = 3,5-bis(trifluoromethyl)phenyl)) were prepared by the reactions of DPCB-Y with [Pd(MeCN)₄]X₂, which were generated from Pd(OAc)₂ and HX in MeCN. On the other hand, the rhodium complexes [Rh(MeCN)₂(DPCB-Y)]OTf were prepared by the treatment of [Rh(μ-Cl)(cyclooctene)₂]₂ with DPCB-Y in CH₂Cl₂, followed by treatment with AgOTf in the presence of MeCN. The cationic complexes catalyzed conjugate addition of benzyl carbamate to α,β-unsaturated ketones.

Original language	English
Pages (from-to)	286-294
Number of pages	9
Journal	Journal of Organometallic Chemistry
Volume	692
Issue number	1-3
DOIs	https://doi.org/10.1016/j.jorganchem.2006.04.048
Publication status	Published - 2007 Jan 1

Keywords

Cationic complex
Conjugate addition to enones
Low-coordinated phosphorus ligand
Palladium
Rhodium

ASJC Scopus subject areas

Chemical Engineering (miscellaneous)
Materials Science (miscellaneous)
Materials Chemistry
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry
Biochemistry

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10.1016/j.jorganchem.2006.04.048

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@article{e47ada4f769448108f37c4a1bdd0a50f,

title = "Synthesis and catalytic properties of cationic palladium(II) and rhodium(I) complexes bearing diphosphinidinecyclobutene ligands",

abstract = "Cationic palladium(II) and rhodium(I) complexes bearing 1,2-diaryl-3,4-bis[(2,4,6-tri-t-butylphenyl)phosphinidene]cyclobutene ligands (DPCB-Y) were prepared and their structures and catalytic activity were examined (aryl = phenyl (DPCB), 4-methoxyphenyl (DPCB-OMe), 4-(trifluoromethyl)phenyl (DPCB-CF3)). The palladium complexes [Pd(MeCN)2(DPCB-Y)]X2 (X = OTf, BF4, BAr4 (Ar = 3,5-bis(trifluoromethyl)phenyl)) were prepared by the reactions of DPCB-Y with [Pd(MeCN)4]X2, which were generated from Pd(OAc)2 and HX in MeCN. On the other hand, the rhodium complexes [Rh(MeCN)2(DPCB-Y)]OTf were prepared by the treatment of [Rh(μ-Cl)(cyclooctene)2]2 with DPCB-Y in CH2Cl2, followed by treatment with AgOTf in the presence of MeCN. The cationic complexes catalyzed conjugate addition of benzyl carbamate to α,β-unsaturated ketones.",

keywords = "Cationic complex, Conjugate addition to enones, Low-coordinated phosphorus ligand, Palladium, Rhodium",

author = "Jensen, {Rader S.} and Kazutoshi Umeda and Masaaki Okazaki and Fumiyuki Ozawa and Masaaki Yoshifuji",

year = "2007",

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doi = "10.1016/j.jorganchem.2006.04.048",

language = "English",

volume = "692",

pages = "286--294",

journal = "Journal of Organometallic Chemistry",

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number = "1-3",

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TY - JOUR

T1 - Synthesis and catalytic properties of cationic palladium(II) and rhodium(I) complexes bearing diphosphinidinecyclobutene ligands

AU - Jensen, Rader S.

AU - Umeda, Kazutoshi

AU - Okazaki, Masaaki

AU - Ozawa, Fumiyuki

AU - Yoshifuji, Masaaki

PY - 2007/1/1

Y1 - 2007/1/1

N2 - Cationic palladium(II) and rhodium(I) complexes bearing 1,2-diaryl-3,4-bis[(2,4,6-tri-t-butylphenyl)phosphinidene]cyclobutene ligands (DPCB-Y) were prepared and their structures and catalytic activity were examined (aryl = phenyl (DPCB), 4-methoxyphenyl (DPCB-OMe), 4-(trifluoromethyl)phenyl (DPCB-CF3)). The palladium complexes [Pd(MeCN)2(DPCB-Y)]X2 (X = OTf, BF4, BAr4 (Ar = 3,5-bis(trifluoromethyl)phenyl)) were prepared by the reactions of DPCB-Y with [Pd(MeCN)4]X2, which were generated from Pd(OAc)2 and HX in MeCN. On the other hand, the rhodium complexes [Rh(MeCN)2(DPCB-Y)]OTf were prepared by the treatment of [Rh(μ-Cl)(cyclooctene)2]2 with DPCB-Y in CH2Cl2, followed by treatment with AgOTf in the presence of MeCN. The cationic complexes catalyzed conjugate addition of benzyl carbamate to α,β-unsaturated ketones.

AB - Cationic palladium(II) and rhodium(I) complexes bearing 1,2-diaryl-3,4-bis[(2,4,6-tri-t-butylphenyl)phosphinidene]cyclobutene ligands (DPCB-Y) were prepared and their structures and catalytic activity were examined (aryl = phenyl (DPCB), 4-methoxyphenyl (DPCB-OMe), 4-(trifluoromethyl)phenyl (DPCB-CF3)). The palladium complexes [Pd(MeCN)2(DPCB-Y)]X2 (X = OTf, BF4, BAr4 (Ar = 3,5-bis(trifluoromethyl)phenyl)) were prepared by the reactions of DPCB-Y with [Pd(MeCN)4]X2, which were generated from Pd(OAc)2 and HX in MeCN. On the other hand, the rhodium complexes [Rh(MeCN)2(DPCB-Y)]OTf were prepared by the treatment of [Rh(μ-Cl)(cyclooctene)2]2 with DPCB-Y in CH2Cl2, followed by treatment with AgOTf in the presence of MeCN. The cationic complexes catalyzed conjugate addition of benzyl carbamate to α,β-unsaturated ketones.

KW - Cationic complex

KW - Conjugate addition to enones

KW - Low-coordinated phosphorus ligand

KW - Palladium

KW - Rhodium

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SN - 0022-328X

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JO - Journal of Organometallic Chemistry

JF - Journal of Organometallic Chemistry

IS - 1-3

ER -

Synthesis and catalytic properties of cationic palladium(II) and rhodium(I) complexes bearing diphosphinidinecyclobutene ligands

Abstract

Keywords

ASJC Scopus subject areas

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