3142-72-1Relevant articles and documents
Synthesis method of trans-2-methyl-2-pentenoic acid
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Paragraph 0062-0067; 0073-0077, (2021/09/04)
The invention adopts a Reppe synthesis method to prepare 2-methyl-2-pentenoic acid. The method comprises the following steps: firstly, by taking m-pentadiene, carbon monoxide and water as raw materials, and taking precious metal rhodium salt and an organic phosphine ligand as catalysts, preparing a cis-trans isomeric intermediate of 2-methyl-3-pentenoic acid, and then carrying out isomerization reaction on the obtained intermediate product to generate trans-2-methyl-2-pentenoic acid, namely trans strawberry acid.
A 2-methyl-2-pentenoic acid synthesis method
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, (2017/02/02)
The invention discloses a synthesis method of a 2-methyl-2-pentenoic acid. The method comprises the following steps: by taking n-propanal as a raw material, synthesizing 2-methyl-2-pentenal by aldehyde-aldehyde condensation; generating 2-methyl-2-pentene aldehyde oxime by the effects of the 2-methyl-2-pentenal and hydroxylamine; dewatering and synthesizing 2-methyl-2-allyl acetonitrile by using the 2-methyl-2-pentene aldehyde oxime under the effect of acetic anhydride; hydrolyzing the 2-methyl-2-allyl acetonitrile into the 2-methyl-2-pentenoic acid under the effect of a sulfuric acid. The reaction formula of the 2-methyl-2-pentenoic acid is shown in the specification. Compared with the prior art, the technology disclosed by the invention has main advantages that the synthesis method is available in synthetic materials, simple to operate, good in process stability, and good in fragrance of synthetic product.
Thermolysis of 4-Methyl-4-(1-propenyl)malonyl Peroxide: Mechanistic Limits to Chemiluminescence Efficiency
Porter, Judith E.,Schuster, Gary B.
, p. 4068 - 4071 (2007/10/02)
The preparation and thermal chemistry of 4-methyl-4-(1-propenyl)malonyl peroxide (3) is described.Thermolysis in acetonitrile at 84 deg C gives 2,4-dimethylbut-2-en-4-olide in 45percent yield and an oligomeric ester derived from an intermediate α-lactone in 55percent yield.The reaction of 3 can be catalyzed by aromatic hydrocarbons such as perylene.Under these conditions weak chemiluminescence results.The mechanism for light generation is identified as chemically initiated electron-exchange luminescence (CIEEL).Application of the CIEEL mechanism to 3 reveals an important limitation to light generation by this path.