5454-12-6Relevant academic research and scientific papers
A levulinic acid by the method of preparation valeric acid and pentanoate (by machine translation)
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Paragraph 0058-0060, (2017/08/30)
The present invention provides a process for preparing valeric acid and by levulinic acid formylvalerate ester, to levulinic acid as a starting material, the hydrogenation catalyst and trifluoromethanesulfonic acid metal salt as a catalyst, the hydrogen atmosphere catalytic hydrogenolysis reaction, to obtain the valeric acid, continue to valeric acid as the raw material, trifluoromethanesulfonic acid metal salt as catalyst, adding alcohol compound to carry out the esterification reaction, to obtain pentanoate. The invention described in the laevulinic acid preparation valeric acid and formylvalerate ester, it has simple process, mild reaction conditions, high product yield, easy to be purified, environment-friendly and the like, and is suitable for large-scale industrial production. (by machine translation)
Cu-catalyzed alkylation of Grignard reagents: A new efficient procedure
Cahiez, Gérard,Chaboche, Christophe,Jézéquel, Michelle
, p. 2733 - 2737 (2007/10/03)
The presence of NMP (4-9 equiv.) clearly improves the yield and the chemoselectivity of the Cu-catalyzed alkylation of organomagnesium reagents. Thus, secondary and tertiary alkylmagnesium chlorides were used successfully for the first time in such a reaction and ester, amide, nitrile or keto groups are tolerated. The procedure is cheap, environmentally friendly and very easy to carry out (1-3% Li2CuCl4 or CuCl, THF, 20°C). It is an interesting alternative to the classical alkylation of organocuprates reagents. (C) 2000 Published by Elsevier Science Ltd.
