Radicaladdition reaction of alkyl halides with ketene dithioacetal monoxide in the presence of tributyltin hydride and a catalytic amount of 2,2'-azobis(isobutyronitrile) (AIBN) proceeds smoothly to provide the corresponding adducts in moderate to high yields.
Copper-Catalyzed Allylation of Alkyl Halides with Allylic Grignard Reagents
作者:Masahiro Sai、Hideki Yorimitsu、Koichiro Oshima
DOI:10.1246/bcsj.82.1194
日期:2009.9.15
Treatment of alkyl halides, including secondary and tertiary alkyl bromides, with allylic Grignardreagents in the presence of a catalytic amount of copper(II) triflate in diisopropyl ether at 25°C yielded the corresponding allylated products in high yields. The coupling reactions of tertiary alkyl halides lead to construction of allylated quaternary carbon centers. The active species is likely to
在催化量的三氟甲磺酸铜 (II) 存在于二异丙醚中的情况下,在 25°C 下用烯丙基格氏试剂处理烷基卤化物,包括仲和叔烷基溴,以高产率得到相应的烯丙基化产物。叔烷基卤化物的偶联反应导致烯丙基化季碳中心的构建。活性物质可能是烯丙基铜酸盐。
Tin-Hydride-Mediated Radical Addition of Alkyl Halides to 2-Methylene-1,3-dithiane Monoxide as a Ketene Equivalent
作者:Hideki Yorimitsu、Koichiro Oshima、Suguru Yoshida
DOI:10.3987/com-09-s(s)6
日期:——
Reductive radical addition of alkyl halides to ketene dithioacetal monoxide in the presence of tributyltin hydride and a radical initiator provides the corresponding adducts, 2-alkyl-1,3-dithiane monoxides, in good yields.
Copper-Catalyzed Reaction of Alkyl Halides with Cyclopentadienylmagnesium Reagent
Treatment of alkyl halides, including tertiary alkyl bromides, with cyclopentadienylmagnesium bromide in the presence of a catalytic amount of copper(II) triflate yielded the corresponding cyclopentadienylated products in high yields. The following hydrogenation of the products provided alkyl-substituted cyclopentanes.