595-46-0Relevant articles and documents
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Plattner et al.
, (1953)
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Method for continuous-flow preparation of 2,2-dimethylmalonic acid
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Paragraph 0013, (2020/11/25)
The invention provides a method for continuous-flow preparation of 2,2-dimethylmalonic acid. According to the method, a micro-channel reactor is utilized, a 2,2-dimethyl propylene glycol solution is used as a material 1, nitric acid is used as a material 2, and the materials are introduced into the micro-channel reactor for continuous-flow synthesis of 2,2-dimethylmalonic acid, wherein the reaction temperature is 30-100 DEG C, and the reaction time is 20-100 s. Compared with a conventional tank reactor in the prior art, the method provided by the invention has the advantages that the reactiontime is greatly shortened, mass transfer and heat transfer are uniform, the amplification effect is avoided, and the yield is improved to a certain extent compared with a tank reaction; more importantly, a liquid holding volume of the method is small, so the potential risk of nitric acid oxidation is greatly reduced; and the safety and operability of the method are improved.
Photodegradation of Myrigalone A, an Allelochemical from Myrica gale: Photoproducts and Effect of Terpenes
Khaled, Amina,Sleiman, Mohamad,Darras, Etienne,Trivella, Aurélien,Bertrand, Cédric,Inguimbert, Nicolas,Goupil, Pascale,Richard, Claire
, p. 7258 - 7265 (2019/07/08)
This study investigated the environmental fate of myrigalone A, a light absorbing natural herbicide found on leaves and fruits of Myrica gale. Myrigalone A was irradiated in water and as a dry solid deposit to simulate reactions on leaves, alone and in the presence of the terpenes generated by Myrica gale. The phototransformation was fast (t1/2 = 35 min in water). Analyses by liquid chromatography coupled to high resolution orbitrap electrospray mass spectrometry (MS) and gas chromatography-MS revealed the formation of 11 photoproducts in water and solid and 9 in gaseous phase. Some were detected in the leaf glands and oil covering the fruits of Myrica gale, which suggested that photodegradation occurred in the field. Moreover, myrigalone A photoinduced the oxidation of terpenes that in turn protected it against photolysis. This highlights the need for additional research on the effect of terpenes on the photodegradation of pesticides on vegetation.
Microwave assisted hydrolysis of Meldrum's acid derivatives and decarboxylation of derived malonic acids
Helavi,Solabannavar,Desai,Mane
, p. 174 - 175 (2007/10/03)
Microwave induced hydrolysis of alkyl Medrum's acids and decarboxylation of derived malonic acids using poly-4-vinylpyridine as a catalyst gives high yields of carboxylic acids in a short time.