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A convenient preparative method of oxo‐dimethylallyl compounds from carboxylic acid derivatives

 

作者: Teruhiko Inaba,   Hideyo Aoki,   Shoji Watanabe,   Masami Sakamoto,   Tsutomu Fujita,  

 

期刊: Journal of Chemical Technology&Biotechnology  （WILEY Available online 1991）
卷期: Volume 52, issue 3  

页码: 407-414

 

ISSN:0268-2575

 

年代: 1991

 

DOI:10.1002/jctb.280520312

 

出版商: John Wiley&Sons, Ltd.

 

关键词: Oxo‐dimethylallyl compounds;allylic Grignard reagent;thermolysis;methylation

 

数据来源: WILEY

 

摘要:

AbstractVarious oxo‐dimethylallyl compounds were prepared from intermediates which are obtained by the reaction of allylic Grignard reagents with carboxylic acid derivatives. For example, the reaction of prenylmagnesium chloride with ethyl hexanoate gave 3,3–dimethyl‐4–prenyl‐1‐nonen‐4–ol (1) in 92% yield. The thermolysis of 1 at the temperature of 693 K gave 2–methyl‐2–decen‐5–one (2) in 81% yield. Furthermore, 3,3–dimethyl‐1‐alken‐4–ones (E) were prepared by the methylation of 1‐alken‐4‐ones (C), which are obtained by the reaction of allylmag

 

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