4‐Chloromethylthiopyrano[3,2‐c][1]benzopyran‐5‐(2H)‐ones were refluxed with o‐bromophenols in acetone in the presence of anhydrous potassium carbonate and sodium iodide to afford a number of 4‐aryloxymethylthiopyrano[3,2‐c][1]benzopyan‐5‐(2H)‐ones in 72–79% yields. These compounds were refluxed with tri‐n‐butyltin hydride and azobisisobutyronitrile in dry benzene for 7–8 h to give [6,6]pyranothiopyrans
在无
水碳酸钾和
碘化钠存在下,将4-
氯甲基
硫代
吡喃并[3,2- c ] [1]苯并
吡喃-5-(2 H)-与邻
溴酚在
丙酮中回流,制得许多4-芳氧基甲
硫吡喃[ 3,2- [ c ] [1]苯并
吡喃-5-(2 H)-1 ,产率72-79%。这些化合物与三回流Ñ在无
水苯-butyltin
氢化物和
偶氮二异丁腈为7-8小时,得到[6,6]中具有良好的非对映选择性76-84%的收率pyranothiopyrans。同样,[6,6]
吡啶硫吡喃类化合物也以非对映选择性优异的70-75%的产率合成。J.杂环化学,(2009)。