Synthesis method of trans-2-methyl-2-pentenoic acid

Synthesis method of trans-2-methyl-2-pentenoic acid

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...

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Bibliographische Detailangaben
Hauptverfasser: HAO GUANGGUO, LI SHOULEI, YU MING, YIN CHAN, DONG SHIQI, WANG YONG, MA XIAO
Format: Patent
Sprache:chi ; eng
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
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Beschreibung
Zusammenfassung: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. 本发明采用Reppe合成法制备草莓酸，首先以间戊二烯、一氧化碳和水为原料，以贵金属铑盐和有机膦配体为催化剂，得到2-甲基-3-戊烯酸的顺反异构中间体，然后所得中间产物经异构化反应生成反式2-甲基2-戊烯酸，即反式草莓酸。