Reducing versus basic properties of 1,2-diaryl-1,2-disodioethanes
摘要:
The outcome of the reaction between halogenated arylacetic acids and 1,2-diaryl-1,2-disodioethanes strongly depends on the nature of both reaction partners, and it can be rationalized in terms of a competition between reducing and basic properties of the vic-diorganometals, as well as of the ease of the reductive cleavage of the different carbon-halide bonds. As an application of these findings, we developed a particularly mild approach to the synthesis of halogenated and non halogenated alpha-substituted arylacetic acids. (C) 2011 Elsevier Ltd. All rights reserved.
and halogenated benzoicacids strongly depends on the nature of both reaction partners. Indeed, whilst chloro-, bromo- and iodobenzoic acids are easily dehalogenated, the reductive cleavage of fluorobenzoic acids proceeds to a high extent only in the presence of the dianions endowed with more powerful reducing properties. Moreover, it was observed that ortho-substituted benzoicacids are more easily
We investigated the reductive elimination of several functionalized and non-functionalized vic-dibromides with 1,2-diphenyl-, 1, 1,2,2-tetraphenyl- and l-phenyl-2-(2-pyridyl)-1,2-disodioethane. The reaction, involving some of the less expensive organic and inorganic reagents, proceeds under mild conditions, and is tolerant of a variety of functional groups. Extension of this procedure to similar 1,2-disubstituted compounds was also investigated. Reductive eliminations run on stereochernical probe compounds strongly suggest that this reaction proceeds via a "single electron" reductive elimination reaction pathway. (c) 2007 Elsevier B.V. All rights reserved.
Schoenberg et al., Chemische Berichte, 1933, vol. 66, p. 245,249
作者:Schoenberg et al.
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Schlenk; Appenrodt; Michael, Chemische Berichte, 1914, vol. 47, p. 477
作者:Schlenk、Appenrodt、Michael、Thal
DOI:——
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