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Volumn 130, Issue 9, 1997, Pages 1175-1187

Organometallic chemistry sans organometallic reagents: Modulated electron-transfer reactions of sub valent early transition metal salts

Author keywords

C C coupling; Chromium; Cleavage reactions; Hydrido complexes; Low valent compounds; Titanium

Indexed keywords


EID: 0001278870     PISSN: 00092940     EISSN: None     Source Type: Journal    
DOI: 10.1002/cber.19971300903     Document Type: Article
Times cited : (28)

References (64)
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    • The role of activated forms of metals or low-valent transitionmetal salts in such couplings has been generously reviewed
    • The role of activated forms of metals or low-valent transitionmetal salts in such couplings has been generously reviewed:
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    • [7b] Reductive couplings on a broad spectrum of carbonyl and azomethine derivatives have been the subject of many recent investigations, exemplified by the following: A. Fürstner, A. Hupperts, A. Ptock, E. Janssen, J. Org. Chem. 1994, 59, 5215;
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    • x by EXAFS X-ray spectroscopy. Although this isolated solid was shown to effect the same McMurry-like coupling with benzophenone, the skeptical chemist could question whether this solid has the same structure and composition as the dissolved form of subvalent titanium reagent initially generated in THF. Moreover, since only 46% of the titanium derivative was isolated, one can inquire in what form or oxidation state the other half of the titanium exists and what its role in the original mode of the McMurry reaction might be [cf. L. E. Aleandri, S. Becke, B. Bogdanovic, D. J. Jones, J. Roziere, J. Organomet. Cliem. 1994, 472, 97].
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    • [21bl A very recent detailed study of the reaction of zirconocene dichloride with ;i-butyllithium (molar ratio 1:2) has uncovered the role of various zirconocene(III) and cyclic zirconium(IV) intermediates in such reductions [V.K: Dioumaev, J. F. Harrod, Organometallics 1997, 16, 1452].
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    • X. unpublished studies.
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    • note
    • 4" but with the clear understanding that chromiurn(I) is certainly present and that only one half of the hydrogen is hydridic and thus protolytically cleaved. Further studies on the precise nature and structure of 64 are underway.
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    • 2 in the addition of organic halides to aldehydes (Nozaki-Hiyama-Kishi processes), consult: A. Fürstner, N. Shi, J. Am. Chem. Soc. 1996, 118, 12349.
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    • , vol.35


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.