Preparation of 2-Picolylarsonic Acid and its Reductive Cleavage by Ascorbic Acid/Iodine and by Thiophenol
作者:Panayiotis V. Ioannou、Pantelis A. Afroudakis、Michael G. Siskos
DOI:10.1080/10426500214875
日期:2002.12.1
nearly quantitative yields 2-picolylarsonic acid. This acid is decomposed by ascorbic acid in the presence of catalytic amounts of iodine to 2-picoline and arsenious acid, most likely by hydride transfer from the ascorbic acid. Thiophenol decomposes this arsonic acid very quickly to 2-picoline, diphenyl disulfide and triphenyl trithioarsenite. In this case a proton from the thiophenol is transferred to the
与二烷基氨基乙基卤化物相反,2-吡啶甲酰氯与碱性亚砷酸盐反应几乎可以定量地生成 2-吡啶甲酸。这种酸在催化量的碘存在下被抗坏血酸分解成 2-甲基吡啶和亚砷酸,最有可能是通过抗坏血酸的氢化物转移。硫代苯酚将这种胂酸迅速分解为 2-甲基吡啶、二苯基二硫化物和三苯基三硫代亚砷酸盐。在这种情况下,来自苯硫酚的质子被转移到初始的 2-甲基吡啶碳负离子。