Palladium-Catalysed Coupling of 4-Halopyrrolo[2,3-<i>d</i>]pyrimidines with Arylacetylenes: Synthesis of a New Heterocyclic System - 4<i>H</i>-Pyrrolo[2,3,4-<i>de</i>]pyrimido[5′,4′:5,6][1,3]diazepino[1,7-<i>a</i>]indole
作者:Sigitas Tumkevicius、Viktoras Masevicius
DOI:10.1055/s-2004-832820
日期:——
Palladium-catalysed reaction of methyl 5-amino-4-chloro(or iodo)-7-methyl-2-methylthiopyrrolo[2,3-d]pyrimidine-6-carboxylate with arylacetylenes affords the corresponding 4-(arylethynyl)pyrrolopyrimidines. Reaction of 5-amino-4-iodopyrrolopyrimidine with 2-ethynyl-N-mesylaniline in the presence of PdCl2(PPh3)2 and CuI led to the formation of 5-amino-4-(1-mesylindol-2-yl)pyrrolopyrimidine which after the removing of mesyl group cyclised with ethyl orthoformate to give the first representative of a novel heterocycle - 4H-pyrrolo[2,3,4-de]pyrimido[5′,4′:5,6][1,3]diazepino[1,7-a]indole.
5-氨基-4-氯(或碘)-7-甲基-2-甲硫基吡咯并[2,3-d]嘧啶-6-羧酸甲酯与芳基炔的钯催化反应可得到相应的4-(芳基乙炔基)吡咯并嘧啶。5-氨基-4-碘吡咯并嘧啶与2-乙炔基-N-甲磺酰基苯胺在PdCl2(PPh3)2和CuI的存在下反应,可形成5-氨基-4-(1-甲磺酰基吲哚-2-基)吡咯并嘧啶,在除去甲磺酰基后,与原甲酸乙酯发生环化反应,得到第一个新型杂环的代表——4H-吡咯并[2,3,4-de]嘧啶并[5′,4′:5,6][1,3]二氮杂卓并[1,7-a]吲哚。