以前未开发的将格利雅(Grignard)添加到羟吲哚中的方法通过一锅芳构化驱动的脱水途径,以高收率提供了一种区域特异性的方法,用于2-和2,3-二取代的吲哚衍生物。这种方法可以方便地制备用作烯丙基[1,2- a ]吲哚和咔唑的正交合成的闭环复分解(RCM)前体的二烯丙基吲哚。该方法的合成效用通过微管蛋白抑制剂和天然存在的咔唑生物碱的合成来说明。
Novel spiro and fused heterocycles from the allylation of indigo
作者:Mohammed K. Abdel-Hamid、John B. Bremner、Jonathan Coates、Paul A. Keller、Celia Miländer、Yasmine S. Torkamani、Brian W. Skelton、Allan H. White、Anthony C. Willis
DOI:10.1016/j.tetlet.2009.09.098
日期:2009.12
The allylation of indigo results in the one-stepsynthesis of two unique complex heterocyclic systems: a spiroindoline–pyridoindolone arising from the addition of three allyl moieties and a fused pyridoindolo-azepinoindolone generated from the addition and subsequent cyclisation of two allyl moieties. The structures of these novel heterocycles are assigned unambiguously using extensive NMR experiments
A versatile photochemical ring-expansion protocol for the synthesis of oxacyclic spirooxindoles under catalyst-free conditions is described. The reaction is enabled by the use of unstrained O-containing heterocycles with 3-diazoindolin-2-ones under visible-light irradiation. Several synthetic advantages for this method are exhibited, including mild conditions, good functional group tolerance, operational
描述了在无催化剂条件下合成 oxacyclic spirooxindoles 的多功能光化学扩环协议。该反应是通过在可见光照射下使用未应变的含 O 杂环和 3-二氮并吲哚-2-酮来实现的。展示了该方法的几个合成优势,包括温和的条件、良好的官能团耐受性、操作简单性和可扩展性。机理研究表明,转化可能通过氧鎓叶立德中间体的形成,然后是离子环化来进行。
Condensation of pseudothiohydantoin with substituted isatins
作者:Minyan Sun、S. M. Ramsh、V. N. Plotkin、S. Yu. Solov’eva
DOI:10.1134/s1070363211090246
日期:2011.9
Pseudothiohydantoin C-5-mono(hydroxymethyl) derivatives were obtained by the reaction of unsubstituted pseudothiohydantoin with substituted isatins. DOI: 10.1134/S1070363211090246
A cascade synthetic route to new bioactive spiroindolinepyrido[1,2-a]indolediones from indirubin
作者:Alexander M. Sele、John B. Bremner、Anthony C. Willis、Rachada Haritakun、Renate Griffith、Paul A. Keller
DOI:10.1016/j.tet.2015.08.012
日期:2015.10
The allylation of indirubin produced the expected indolic N'-allylindirubin and N,N'-diallylindirubin derivatives in moderate yields, together with the corresponding N-substituted isatin products. At higher temperatures, the base-initiated reaction with allylic halides yielded spiroindolinepyrido[1,2-a]indolediones in a one-pot cascade reaction sequence with yields of up to 70%. These readily accessed, new Spiro compounds represent the first reported examples of indirubin participating in cascade reactions. Preliminary in vitro biological testing of some of the products indicated promising activity against some cancer cell lines and against Plasmodium falciparum for two spiro derivatives. Computational methods were used to gain a greater understanding of the UV/Vis spectroscopic data for the N'-substituted and N,N'-disubstituted indirubin derivatives. (C) 2015 Elsevier Ltd. All rights reserved.
VOSHCHULA, V. N.;TOLKUNOV, S. V.;ZUBRITSKIJ, M. YU.;DULENKO, V. I., XIMIYA GETEROTSIKL. SOED.,(1988) N 10, S. 1414-1419
作者:VOSHCHULA, V. N.、TOLKUNOV, S. V.、ZUBRITSKIJ, M. YU.、DULENKO, V. I.