57142-64-0Relevant academic research and scientific papers
Environmental-friendly method for synthesizing acyloxy substituted styrene compound
-
Paragraph 0046; 0047, (2019/01/07)
The invention relates to an environmental-friendly method for synthesizing an acyloxy substituted styrene compound. The method comprises the following steps of S1, at the temperature of being lower than or equal to 0 DEG C, performing reaction on the hydroxyl substituted styrene compounds, basic catalysts, a first part of polymerization inhibitors and acetylation reagents in organic solvents for afirst preset time period to obtain a first reaction mixture; S2, filtering the first reaction mixture; performing filtering to obtain a filter cake; adding lower alcohol and the second part of polymerization inhibitors into obtained filter liquid; performing reaction for a second preset time period to obtain a liquid mixture containing acyloxy substituted styrene compound; concentrating the liquid mixture; recovering the at least one part of organic solvents to obtain the acyloxy substituted styrene compound. The method provided by the invention has the advantages that organic solvents can bedirectly recovered; in addition, in the process of synthesizing the acyloxy substituted styrene compound, water is not used, so that waste water cannot be generated; the environment protection is facilitated.
Preparation method of 3,4-diacetoxystyrene
-
, (2018/07/06)
The invention relates to a preparation method of 3,4-diacetoxystyrene. The method comprises the steps of allowing 3,4-dihydroxy benzaldehyde and malonic acid to react in the presence of at least one organic solvent and a catalyst at 60-70 DEG C to generate a first reaction mixture containing 3,4-dihydroxy cinnamic acid, heating up to 80-90 DEG C to allow the first reaction mixture to continue reaction to generate a second reaction mixture containing 3,4-dyhydroxy styrene, allowing 3,4-dyhydroxy styrene to react with an acetylation reagent to generate a third reaction mixture containing 3,4-diacetoxystyrene, and purifying the third reaction mixture to form 3,4-diacetoxystyrene. The invention further provides a preparation method of an acetylation derivative of styrene. The method has the benefits that raw materials for preparation are easy to obtain; the cost is low; a synthesis condition is mild; a technology is simple and convenient; a post-treatment procedure is quick; and industrialization is easy to achieve.
METHOD FOR THE SYNTHESIS AND PRODUCTION OF ALKENYL COMPOUND
-
, (2018/09/20)
PROBLEM TO BE SOLVED: To provide a method for producing an efficient alkenyl compound conveniently and inexpensively. SOLUTION: A first compound represented by formula (1) reacts with a second compound represented by formula (3), in the presence of amino acid, in solvent containing amine, in a range of 50-200°C, to produce an alkenyl compound represented by formula (A) [where R1 is hydrogen or an optionally substituted C1-C30 alkyl group, R2 is a carboxyl group or the like, R3 and R4 are hydrogen, an optionally substituted C1-C30 alkyl group or the like]. SELECTED DRAWING: None COPYRIGHT: (C)2018,JPOandINPIT
Method for preparing hydroxystyrenes and acetylated derivatives thereof
-
Page/Page column 9, (2008/06/13)
A method is provided for the thermal decarboxylation of a phenolic substrate in the presence of a non-amine basic catalyst to produce a vinyl monomer. The product of the decarboxylation reaction may additionally be acetylated in the presence of an acetylating agent in the same reaction vessel.
