7424-54-6Relevant articles and documents
Preparation method of medical intermediate 3,5-heptadione
-
Paragraph 0021; 0031, (2018/04/26)
The invention provides a preparation method of medical intermediate 3,5-heptadione. The preparation method comprises the following step: carrying out a reaction on raw materials butanone and methyl propionate in an organic solvent in the presence of an alkaline catalyst to obtain 3,5-heptadione. The method can improve the selectivity and the reaction yield of 3,5-heptadione effectively, and the reaction yield can reach 72.4%. The post-treatment difficulty of the reaction is reduced, the environmental pollution is alleviated, the production cost is lowered, and the production economical efficiency and safety are improved.
Preparation technology of 3,5-heptanedione
-
Paragraph 0019; 0020, (2018/04/21)
The invention discloses a preparation technology of 3,5-heptanedione. The technology comprises the steps of reacting ethyl propionate with methyl ethyl ketone in the presence of a water-insoluble aprotic solvent to obtain 3,5-heptanedione. According to the preparation technology of 3,5-heptanedione provided by the present invention, due to use of the water-insoluble aprotic solvent as a reaction solvent, the solvent is easy to recycle and production cost is saved.
Preparation process of 3,5-heptadione
-
Paragraph 0019; 0020; 0021; 0022; 0023; 0024, (2017/08/31)
The invention discloses a preparation process of 3,5-heptadione. The preparation process comprises the step of reacting by virtue of ethyl propionate and methyl ethyl ketone in the pretense of a non-water-soluble aprotic solvent, so as to obtain 3,5-heptadione. According to the preparation process of 3,5-heptadione, a non-water-soluble aprotic solvent is taken as a reaction solvent and is easy to recycle, so that the production cost is saved.