Synthesis of Arylallenes by Palladium-Catalyzed Retro-Propargylation of Homopropargyl Alcohols
摘要:
Treatment of tertiary homopropargyl alcohol with aryl halide under palladium catalysis provided arylallenes regioselectively. The reaction includes retropropargylation, which proceeds in a concerted fashion via a cyclic transition state and transfers the stereochemistry of homopropargyl alcohols through C-C bond cleavage. The present method enables the use of homopropargyl alcohols as allenylmetal equivalents.
Treatment of tertiary homopropargyl alcohol with aryl halide under palladium catalysis provided arylallenes regioselectively. The reaction includes retropropargylation, which proceeds in a concerted fashion via a cyclic transition state and transfers the stereochemistry of homopropargyl alcohols through C-C bond cleavage. The present method enables the use of homopropargyl alcohols as allenylmetal equivalents.
C–F bond formation with fluoride anions – highly selective iodofluorination of simple allenes
作者:Can Xue、Xinpeng Jiang、Chunling Fu、Shengming Ma
DOI:10.1039/c3cc42014k
日期:——
A highly regioselective (up to 99â:â1) iodofluorination reaction of simple allenes occurs under mild conditions with Et3N·3HF or Py·9HF to afford 2-iodoalken-3-yl fluorides.