Unsymmetrically substituted furoxans. Part 16 . Reaction of benzenesulfonyl substituted furoxans with ethanol and ethanethiol in basic medium
作者:Giovanni Sorba、Giuseppe Ermondi、Roberta Fruttero、Ubaldina Galli、Alberto Gasco
DOI:10.1002/jhet.5570330220
日期:1996.3
The use of benzenesulfonyl substituted furoxans as flexible intermediates for the synthesis of new functionalized furoxans interesting for their potential biological properties is discussed. Reaction of benzenesul-fonylphenylsulfonylfuroxan isomers 7a and 7b with ethanol and ethanethiol in basic medium affords the expected ethers and sulphides respectively. Reaction of bis(benzenesulfonyl)furoxan (1)
讨论了使用苯磺酰基取代的呋喃类化合物作为柔性中间体,用于合成新型功能化的呋喃类化合物,其潜在的生物学特性引起人们的兴趣。在碱性介质中,苯磺酰甲酰基苯基磺酰基呋喃喃异构体7a和7b与乙醇和乙硫醇反应,分别得到预期的醚和硫化物。根据实验方法,双(苯磺酰基)呋喃喃(1)与乙醇在碱性介质中反应,得到3-苯磺酰基-4-乙氧基呋喃喃(2)或二乙氧基呋喃喃(3)。相反,1与乙硫醇的反应给出了取代化合物和4-苯磺酰基-3-乙基硫呋喃的混合物(11)。化合物的结构已经通过核磁共振波谱进行了鉴定,并且在3-苯磺酰基-4-乙基硫代呋喃(9b)的情况下,通过X射线分析得以证实。