Nanjing University of Technology and Zhejiang Medicine Co. | Date: 2012-12-10
Disclosed is a preparation method of the lycopene intermediate 3-methyl-4,4-dialkoxy-1-butaldehyde. The preparation method comprises the following steps: (1) reacting 2-methyl-3,3-dialkoxy-1-halopropane with magnesium powder in the solvent of anhydrous tetrahydrofuran at a temperature of 4565 C. to generate a mixture of Grignard reagents under the protection of an inert gas; and (2) adding N,N-disubstituted carboxamide to the mixture of Grignard reagents and reacting at a temperature of 10 C.35 C. to obtain 3-methyl-4,4-dialkoxy-1-butaldehyde. The process route of the present invention is simple and direct, the operation is easy, the conditions are mild and the yield is good, and thus the invention has commercial value.
Nanjing University of Technology | Date: 2013-11-27
It discloses a use of N-acetylneuraminic acid aldolase with an amino acid sequence as shown in SEQ ID NO: 2 in catalytic synthesis of N-acetylneuraminic acid. The preparation of N-acetylneuraminic acid is to use the N-acetylneuraminic acid aldolase with the amino acid sequence as shown in SEQ ID NO: 2 as a catalyst, and N-acetylmannosamine and pyruvic acid as substrates.
Nanjing University of Technology | Date: 2012-09-13
This invention belongs to the field of biochemical engineering and relates to a method of cyclic utilization of water during separation of succinic acid made by fermentation. This invention uses water from separation process for aerobic growth of
Nanjing University of Technology and Changshu Yutyrone Advanced Wear Materials Technology Co. | Date: 2012-10-10
The methods for preparing Cu-BTC and nano-Cu-BTC are disclosed. An imporous coordination compound Cu(C
Nanjing University of Technology | Date: 2013-03-26
The present invention relates to a medium and high-temperature carbon-air cell, which include a solid oxide fuel cell, a CO