Synthesis of Benzothiadiazines, Benzothiadiazepines, and Benzothiadiazocines from Intramolecular Azide Reactions and Iodocyclisations
作者:Karl Hemming、Nilesh Patel、Christopher Chambers
DOI:10.1055/s-0029-1218278
日期:2009.11
N-Homoallyl-substituted (2-aminoaryl)sulfonamides undergo intramolecular iodocyclisation to furnish aziridine-fused 1,2,6-benzothiadiazocines. The identical aziridine-fused 1,2,6-benzothiadiazocines were also available from an intramolecular azide to alkene 1,3-diploar cycloaddition involving the corresponding N-homoallylic (2-azidoaryl)sulfonamides in boiling carbon tetrachloride. The use of boiling DMF as solvent for the same reaction gave pyrrolo-fused benzothiadiazines. Intramolecular azide-alkene cycloadditions also allowed access to aziridine-fused pyrrolobenzothiadiazepines and pyrrolobenzodiazepines.
N-高烯丙基取代的(2-氨基芳基)磺酰胺经过分子内碘环化反应生成了氮丙啶融合的 1,2,6-苯并噻二唑并[1,2,6-benzothiadiazocines]。在沸腾的四氯化碳中,用相应的 N-(2-叠氮芳基)磺酰胺进行分子内叠氮到烯烃的 1,3-二环加成反应,也可以得到相同的叠氮基融合的 1,2,6-苯并噻二唑并类化合物。使用沸腾的 DMF 作为溶剂进行相同的反应,可得到吡咯并融合的苯并噻二嗪。分子内叠氮-烯环加成反应还可以得到叠氮基融合的吡咯并噻二氮杂卓和吡咯并二氮杂卓。