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Author(s): Chen SN; Wu WY; Tsai FY
Title: Hiyama reaction of aryl bromides with arylsiloxanes catalyzed by a reusable palladium(II)/cationic bipyridyl system in water
Source: TETRAHEDRON 64 (35): 8164-8168
Date: 2008 AUG 25
Document Type: Journal : Article
DOI:
Language: English
Comment:
Address: Natl Taipei Univ Technol, Inst Organ & Polymer Mat, Taipei 106, Taiwan.
Reprint: Tsai, FY, Natl Taipei Univ Technol, Inst Organ & Polymer Mat, Taipei
106, Taiwan. E-mail: fuyutsai@ntut.edu.tw
Author Keywords: Hiyama reaction; water-soluble catalyst; reusable; cross-coupling;
biaryls
KeyWords Plus: CROSS-COUPLING REACTIONS; HYPERVALENT SILOXANE DERIVATIVES; MILD
AEROBIC CONDITIONS; PALLADIUM CATALYSTS; STILLE REACTION; ORGANIC
ELECTROPHILES; UNSYMMETRICAL BIARYLS; EFFICIENT CATALYST; SODIUM-
HYDROXIDE; SUZUKI
Abstract: A Pd(NH3)(2)Cl-2/cationic bipyridyl catalytic system catalyzed the cross-coupling reaction of aryl bromides with arylsiloxanes in water under aerobic conditions in the presence of NaOH to afford biaryls in good to high yields. The reaction was performed at 120 degrees C and the loading amount of catalyst can be as low as 0.001 mol %. After extraction, the residual aqueous phase can be reused several times with only a slight decrease in activity. (C) 2008 Elsevier Ltd. All rights reserved.
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