低聚亚碘酰苯硫酸根,(PhIO)3 SO 3形式上可以被认为是部分解聚的活化碘代苯,是一种易于获得,稳定且水溶性的高价碘试剂,可用于硫化物或烯烃的氧化。此外,该试剂可以方便地从(二乙酰氧基碘)苯和硫酸氢钠原位产生,并且无需在水溶液中或在无溶剂条件下进行氧化分离就可以使用。碘代碘代苯硫酸盐在室温下与有机硫化物原位反应可提供高收率的亚砜,而不会过度氧化成砜,并且该反应与底物分子中存在羟基,双键,苄基碳原子,羧酸酯基团相容以及各种取代的苯环。 氧化-碘-亚砜-碘基苯-(二乙酰氧基碘)苯-高价碘
Facile preparation and reactivity of polystyrene-supported (dichloroiodo)benzene: a convenient recyclable reagent for chlorination and oxidation
作者:Jiang-Min Chen、Xiao-Mei Zeng、Kyle Middleton、Viktor V. Zhdankin
DOI:10.1016/j.tetlet.2011.02.065
日期:2011.4
of polystyrene-supported (dichloroiodo)benzene (loading of -ICl2 up to 1.35 mmol/g) from polystyrene, iodine, and bleach has been developed. This recyclable reagent is useful for efficient chlorination of organic substrates and selective oxidation of various alcohols to the corresponding carbonyl compounds in high yields under mild conditions. The final products are conveniently separated from the polymeric
Abstract Dowex (strongly acidic cationic exchange resin) polymer is employed as solid acid catalyst for the clean and less hazardous protection of carbonyl compounds as phenylhydrazones and 2,4‐dintrophenylhydrazones in ethanol under reflux conditions. The reactions proceed very smoothly and the yields of the derivatives are excellent.