期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 24, 期 9, 页码 2264-2269出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201705381
关键词
1,3-butadiene; assisted tandem catalysis; carbonylation reactions; linear diester; palladium catalysis
资金
- Fonds der chemischen Industrie (FCI)
Two novel reaction pathways were tested to synthesize the linear alpha,omega-C-10-diester exclusively from three basic reagents: 1,3-butadiene, carbon monoxide and methanol. Therefore, carboxytelomerization of 1,3-butadiene and methanol was merged with methoxycarbonylation in two different ways to obtain highly linear C-10-diester. Through a palladium-based and -assisted tandem catalytic system, 22% yield of the desired C-10-diester was obtained without isolating the intermediates. Subsequently, the limitations of the novel assisted tandem catalytic concept were uncovered and based on that, a two-step reaction regime was established. By optimization of the carboxytelomerization, the C-9-monoester as intermediate could be formed in nearly quantitative yields and excellent linearity. In a second reaction step, the isolated monoester was successfully converted by methoxycarbonylation into the desired linear C-10-diester in overall yields up to 84%.
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