The 1,3-dipolar cycloaddition of N-aryl-C-ethoxycarbonylnitrile imines to pyridazin-3-thione afforded novel spirothiadiazolopyridazines in moderate to good yields. The reaction occurs regioselectively at the exocyclic C=S bond. Some of the newly synthesized compounds were tested for their in vitro antitumor activity against three human and murine cell lines [human: A2780, (ovary, carcinoma), A549 (lung, carcinoma); murine: P388 (leukaemia)]. Among the series, some compounds exhibited significant growth inhibitory effects against cell lines P388.
A General Synthesis of Substituted Indoles from Cyclic Enol Ethers and Enol Lactones
作者:Kevin R. Campos、Jacqueline C. S. Woo、Sandra Lee、Richard D. Tillyer
DOI:10.1021/ol036113f
日期:2004.1.1
[reaction: see text] X = CH2, C[double bond]O, R2 = H, alkyl. A general method was developed for the one-pot synthesis of highly functionalized indoles from simple, commercially available aryl hydrazines and cyclicenolethers. Enol lactones were also used as substrates, affording substituted indole acetic acid or indole propionic acid derivatives. This procedure affords 2,3-disubstituted indoles as
[反应:见正文] X = CH 2,C [双键] O,R 2 = H,烷基。已开发了一种通用方法,用于从简单的市售芳基肼和环状烯醇醚一锅合成高官能化的吲哚。烯醇内酯也用作底物,提供取代的吲哚乙酸或吲哚丙酸衍生物。该方法由适当取代的烯醇醚或烯醇内酯得到2,3-二取代的吲哚,作为单一的区域异构体。该方法在抗偏头痛药物舒马曲坦和消炎药消炎痛的有效合成中得到了强调。
An expeditious and environmentally benign methodology for the synthesis of substituted indoles from cyclic enol ethers and enol lactones
作者:Pankajkumar R. Singh、Mandar P. Surpur、Sachin B. Patil
DOI:10.1016/j.tetlet.2008.02.107
日期:2008.5
A simple and environmentally friendly method is developed for the synthesis of substituted indoles from commercially available aryl hydrazines and cyclic enolethers with Montmorillonite-K10 as a heterogeneous catalyst. The catalyst is non-toxic, inexpensive and recyclable and the process is clean, high yielding and operationally simple.