K_2S_2O_8/H_2O/NaOTf体系促进的烯基叠氮类化合物的Schmidt重排反应

在中性的反应条件下,三氟甲磺酸钠促进过硫酸钾与水经自由基反应过程产生质子,进而诱发烯基叠氮化合物的Schmidt重排反应,一步合成了多种取代的乙酰苯胺类化合物.对反应的自由基引发剂、溶剂、温度、时间等因素的考察,得到了最优的反应条件.该反应具有原料简单易得、操作简便、底物普适性好等优点.通过机理的研究和相关文献的调研,最后提出了可能的反应机理.     

SmI_2-Mediated Addition Reaction of α-Halomethylsulfones to Carbonyl Compounds.A Convenient Synthesis of β-Hydroxysulfones

Due to the chemoselective dehalogenation by SmI_2, the additionof α-halomethylsulfones to carbonyl compounds afforded β-hy-droxysulfones. Those reactions with α-bromomethylsulfonesgave the products in moderate to good yields. The SmI_2-mediat-ed addition of gem-dihalomethylsulfones to ketones also afford-ed α-halo-β-hydroxysulfones in moderate yields.     

SmI2－Mediated Addition Reaction of α－Halomethylsulfones to Carbonyl Compounds. A Convenient Synthesis of β－Hydroxysulfones

Due to the chemoselective dehalogenation by SmI2, the addition of a-halomethylsulfones to carbonyl compounds afforded ,β-hydroxysulfones. Those reactions with α-bromomethylsulfones gave the products in moderate to good yields. The SmI2-mediated addition of gem-dihalomethylsulfones to ketones also afforded α-halo-β-hydroxysulfones in moderate yields.     

烯基叠氮与二异丙基黄原酸酯的自由基串联反应:合成6-巯甲基菲啶（英文）

发展了偶氮二异丁腈诱发的烯基叠氮类化合物与二异丙基黄原酸酯的自由基串联反应,一步构建了碳-硫和碳-氮键.以50%至80%的收率方便和高区域选择性地合成了一系列官能化的6-巯甲基菲啶类化合物.机理研究表明该反应通过自由基路径进行.