28163-88-4Relevant articles and documents
(E)-beta,gamma-alkenyl carboxylic acid derivative and preparation method thereof
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Paragraph 0083-0086, (2017/08/31)
The invention discloses an (E)-beta,gamma-alkenyl carboxylic acid derivative and a preparation method thereof. The preparation method disclosed by the invention comprises the following steps: in an organic solvent, under the condition that a nickel catalyst, a dinitrogen ligand, a reducer and an additive exist, carrying out a carboxylation reaction on an allyl alcohol substrate as shown in formula (II) and carbon dioxide. The preparation method disclosed by the invention is high in selectivity, the raw material reagents are easy to get and has high chemical selectivity and region selectivity, and the derivative is high in yield, high in purity, and low in generation cost and is more applicable for industrial production. (Refer to Specification).
Regioselective Ni-Catalyzed Carboxylation of Allylic and Propargylic Alcohols with Carbon Dioxide
Chen, Yue-Gang,Shuai, Bin,Ma, Cong,Zhang, Xiu-Jie,Fang, Ping,Mei, Tian-Sheng
supporting information, p. 2969 - 2972 (2017/06/07)
An efficient Ni-catalyzed reductive carboxylation of allylic alcohols with CO2 has been successfully developed, providing linear β,γ-unsaturated carboxylic acids as the sole regioisomer with generally high E/Z stereoselectivity. In addition, the carboxylic acids can be generated from propargylic alcohols via hydrogenation to give allylic alcohol intermediates, followed by carboxylation. A preliminary mechanistic investigation suggests that the hydrogenation step is made possible by a Ni hydride intermediate produced by a hydrogen atom transfer from water.
A 3 - methylthio - γ - method for preparing lactone (by machine translation)
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Paragraph 0012; 0013, (2017/04/12)
The invention relates to shown in the following formula of 3 - methylthio - γ - method for preparing lactone: The method comprises the steps: aliphatic aldehyde with malonic acid in dimethyl sulfoxide in acetic acid piperidine salt under the catalytic action of the 100 °C the left and the right reaction, to obtain (E)- 3 - alkane olefine acid, yield 55 - 85%; in the - 78 - 10 °C will b a asian sulphone drop added to the oxalyl chloride in dichloromethane solution, then the (E)- 3 - alkane olefine acid added, at - 78 - 30 °C reaction, to obtain 3 - methylthio - γ - lactone, yield 60 - 82%. (by machine translation)