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Organomanganese (II) reagents XVIII: Copper-catalyzed 1,4- addition of organomanganese chloride compounds to conjugated ethylenic aldehydes

✍ Scribed by Gérard Cahiez; Mouad Alami

Publisher
Elsevier Science
Year
1989
Tongue
French
Weight
231 KB
Volume
30
Category
Article
ISSN
0040-4039

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✦ Synopsis

Organomanganese chlorides react with p-mono or p,p-bisubstituted a&ethylenic aldehydes in the presence of a catalytic amount of copper chloride to give good yields of I ,4-addition products in THF at -30 "c.

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## Copper-catalyzed conjugate addition of organomanganese reagents to a, B ethylenic esters easily takes place in THF at O'C, in the presence of 3% CuCl and MejSiCI. Good to moderate yields are obtained from organomanganese reagents preparedfrom organolithium or organomagnesium compounok Recently,

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