4744-08-5Relevant articles and documents
Preparation method 1 and 1 - diethoxypropane
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Paragraph 0019-0028, (2021/11/21)
The invention discloses a preparation method of 1-1 - diethoxypropane. Ethanol and propionaldehyde are used for contacting with a solid acid catalyst under the condition of vaporization, and water is taken out. 1,1 - Diethoxypropane crude product is discharged from the bottom side of the rectification tower, and the rectification obtains 98%, 1 diethoxypropane with a purity greater than 1 . To the method, the problem of long reaction time at low temperature is solved, the single conversion rate is relatively high, 1 and 1 - diethoxy propane in the obtained crude product is 50 - 80%, 99% diethoxypropane can be obtained through rectification, the highest yield can reach 1 97% 1 - continuous feeding is facilitated, and pipeline continuous reaction is carried out.
Phosphine-free cobalt pincer complex catalyzed: Z -selective semi-hydrogenation of unbiased alkynes
Landge, Vinod G.,Pitchaimani, Jayaraman,Midya, Siba P.,Subaramanian, Murugan,Madhu, Vedichi,Balaraman, Ekambaram
, p. 428 - 433 (2018/02/07)
Herein, we report a novel, molecularly defined NNN-type cobalt pincer complex catalyzed transfer semi-hydrogenation of unbiased alkynes to Z-selective alkenes. This unified process is highly stereo- and chemo-selective and exhibits a broad scope as well as wide functional group tolerance. Ammonia-borane (AB), a bench-stable substrate with high gravimetric hydrogen capacity, was used as a safe and practical transfer hydrogenating source.
Method for preparing 2,4-heptadienal
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Paragraph 0010; 0011, (2017/08/28)
The invention discloses a method for preparing 2,4-heptadienal. Heptadienal is prepared by taking propyl aldehyde as a starting material through the following three reaction steps: (1), synthesizing acrolein diethyl acetal through absolute ethyl alcohol and anhydrous calcium chloride; (2), synthesizing 1,1,3,5-tetraethoxyheptane through acrolein diethyl acetal, BF3 diethyl ether and vinyl ether; and (3), synthesizing trans-2-trans-4-heptadienal through 1,1,3,5-tetraethoxyheptane and hydrochloric acid. The method disclosed by the invention has the beneficial effects that raw materials are easily obtained, and cheap; a condition is easily controlled and operated; and, the product is relatively low in cost and better in quality, and is suitable for large-scale production.