Cyclization of 2- and 3-indolylthiobenzoic, phenylacetic and nicotinic acids and esters to novel indole-containing tetracyclic ring systems
作者:Pierre Hamel、Mario Girard、Nancy N. Tsou
DOI:10.1002/jhet.5570360312
日期:1999.5
A series of 2- and 3-indolylthio benzoic, phenylacetic and nicotinicacids or esters were cyclized under dehydrative conditions affording several tetracyclicindole-containing ketones, several of which constitute the first reported examples of novelringsystems, such as the [1]benzothiepino[2,3-b] and [3,2-b]indole and the pyrido[3′2′:5,6] and [3′4′:5,6]thiopyrano[2,3-b] and [3,2-b]indole as well
在脱水条件下将一系列2-和3-吲哚硫基苯甲酸,苯乙酸和烟酸或酯环化,得到几个含四环吲哚的酮,其中几个构成了首次报道的新型环系统的实例,例如[1] benzothiepino [2,3- b ]和[3,2- b ]吲哚和吡啶基[3'2':5,6]和[3'4':5,6]硫代吡喃并[2,3- b ]和[ 3,2- b ]吲哚以及[3'2':5,6]和[3'4':5,6] [1,3]噻嗪基[3,2- a ]吲哚环系统。
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。
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