Preparation and reactions of new low-valent samarium reagents

Preparation and reactions of new low-valent samarium reagents

New low-valent samarium reagents were prepared by the reaction of metallic samarium with bromine in a molar ratio of 4: 3 or by the reaction of samarium(III) bromide with butyllithium. These reagents exhibited reducing ability higher than that of samarium(II)iodide or metallic samarium. Aromatic aci...

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Veröffentlicht in:Nippon Kagakukai shi (1972) 1993-01, Vol.1993 (5), p.482-486
Hauptverfasser: YOSHIZAWA, T, HATAJIMA, T, AMANO, H, IMAMOTO, T
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container_end_page 486
container_issue 5
container_start_page 482
container_title Nippon Kagakukai shi (1972)
container_volume 1993
creator YOSHIZAWA, T
HATAJIMA, T
AMANO, H
IMAMOTO, T
description New low-valent samarium reagents were prepared by the reaction of metallic samarium with bromine in a molar ratio of 4: 3 or by the reaction of samarium(III) bromide with butyllithium. These reagents exhibited reducing ability higher than that of samarium(II)iodide or metallic samarium. Aromatic acid esters were reductively dimerized by these reagents. Diethyl trans-cyclopropane-1, 2-dicarboxylate was subjected to the reductive ringopening reaction on treatment with these reagents. The reaction of dimethyl cyclopropane-1, 1-dicarboxylate with metallic samarium in the presence of mercury halides afforded bis[3, 3-bis (methoxycarbonyl) propyl] mercury.
doi_str_mv 10.1246/nikkashi.1993.482
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title Preparation and reactions of new low-valent samarium reagents
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