Facile synthesis of thiochromeno[2,3-b]indol-11(6H)-ones and pyrido[3′,2′:5,6]thiopyrano[2,3-b]indol-5(10H)-ones
作者:Mostafa Kiamehr、Firouz Matloubi Moghaddam、Volodymyr Semeniuchenko、Alexander Villinger、Peter Langer、Viktor O. Iaroshenko
DOI:10.1016/j.tetlet.2013.07.012
日期:2013.9
Indole-2(3H)thiones were cyclized under the action of 2-fluorobenzoyl chlorides to give thiochromeno[2,3-b]indol-11(6H)-ones or under the action of 2-chloronicotinoyl chlorides to give pyrido[3′,2′:5,6]thiopyrano[2,3-b]indol-5(10H)-ones. The reaction of cyclization proceeds regioselectively in DMF and does not require transition metals for completion. Obtained heterocycles are isosteric analogues of
吲哚-2(3 H)
硫酮在2-
氟苯甲酰氯的作用下被环化,得到
硫代色素[2,3 - b ]
吲哚-11(6 H)-一或在
2-氯烟酰氯的作用下得到
吡啶并[ 3′,2′:5,6]
硫代
吡喃并[2,3 - b ]
吲哚-5(10 H)-ones。环化反应在
DMF中区域选择性地进行,不需要过渡
金属即可完成。获得的杂环是各种四环
吲哚衍生的
生物碱的等排类似物。