Organobismuth V compounds

Diarylbismuthinic Acids and Their Esters. Although organobismuth(V) compounds containing three, four, or five Bi—C bonds are well-known, no compounds containing two such bonds had been prepared until a number of methyl diarylbismuthinates (diarylmethoxybismuth oxides) were reported ia 1988 (145). 

Quaternary bismuth compounds have not found extensive use ia industry or ia organic synthesis. In manifold studies of organobismuth(V) compounds as oxidi2ing and arylating agents, such quaternary bismuth compounds as (CgH )4Bi02CCH2, (CgH )4Bi02SCgH4CH2-4, and... 

Sparteine 1 was also used in a palladium complex-catalyzed enantios-elective benzoylation of alcohols using monoxide and the organobismuth(V) compound (Scheme 37). The carbonylative acylation of alcohols using carbon monoxide (CO) is known to be an alternative tool for the prepar-... 

Organobismuth(V) compounds are potential oxidants because of their inherent oxidizing ability, which derives from the facile Bi(V)/Bi(III) redox process [72], This characteristic property of bismuth has been utilized for alcohol oxidation... 

Because organobismuth(V) compounds have found considerable use as oxidizing agents, the oxidizing ability of methyl di-l-naphthylbismuthinate [124066-66-6], C21H17Bi02, was investigated. Benzoin yields benzil, naphthalene, and metallic bismuth hydrazobenzene yields azobenzene, and 1,1,2,2-tetraphenylethanediol yields benzophenone. 1,2-Diphenyl-1,2-ethanedione dihydrazone gives diphenylacetylene in 50% yield. Cyclohexane-1,2-diol and 1-phenylethane-l,2-diol, however, were unaffected. 

Organobismuth(v) compounds are potential oxidants due to the facile Bi(v)/Bi(m) redox process. Primary and secondary alcohols are oxidized by Ph3BiC03 or by a (Ph3BiCl)20-base system to aldehydes and ketones,... 

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