Iron(II) Chloride Catalyzed Alkylation of Propargyl Ethers: Direct Functionalization of an sp³ C-H Bond Adjacent to Oxygen
作者:Yuhong Zhang、Yongju Xie、Ming Yu
DOI:10.1055/s-0030-1260131
日期:2011.9
Iron(II) chloride catalyzed direct alkylation of sp³ C-H bond adjacent to oxygen in propargyl ethers has been accomplished by the use of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) as oxidant under mild reaction conditions. The reaction proceeded smoothly with a variety of 1,3-diketones leading to β-dicarbonyl ether in moderate yields. In the absence of 1,3-diketones, ynenones were produced by the use of iron(III) chloride and DDQ.
在温和反应条件下,使用2,3-二氯-5,6-二氰基-1,4-苯醌(DDQ)作为氧化剂,铁(II)氯化物催化实现了炔丙基醚中与氧相邻的sp³ C-H键的直接烷基化。该反应顺利进行,多种1,3-二酮类化合物以中等收率生成β-二羰基醚。在没有1,3-二酮的情况下,使用铁(III)氯化物和DDQ生成亚胺酮。