期刊
ORGANIC LETTERS
卷 16, 期 18, 页码 4960-4963出版社
AMER CHEMICAL SOC
DOI: 10.1021/ol502538r
关键词
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资金
- MEXT, Japan [22000009]
- JSPS [25708017]
- Grants-in-Aid for Scientific Research [25708017, 14J00435] Funding Source: KAKEN
The nickel-catalyzed double carboxylation of internal allcynes employing carbon dioxide (CO2) has been developed. The reactions proceed under CO2 (1 atm) at room temperature in the presence of a nickel catalyst, Zn powder as a reducing reagent, and MgBr2 as an indispensable additive. Various internal alkynes could be converted to the corresponding maleic anhydrides in good to high yields. DFT calculations disclosed the indispensable role of MgBr2 in the second CO2 insertion.
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