Electrophilic Cyclization of Aryl Propargylic Alcohols: Synthesis of Dihalogenated 6,9-Dihydropyrido[1,2-<i>a</i>]indoles via a Cascade Iodocyclization
A strategy for the synthesis of 6,9-dihydropyrido[1,2-a]indoles through a cascade iodocyclization of 4-(3-methyl-1H-indol-1-yl)-1,1-diphenylbut-2-yn-1-ol derivatives is presented. This reaction was conducted under very mildconditions and in a short time. The reactions are metal-free, are environmentally friendly and give up to 94% yield. Moreover, the obtained halides allow functional group diversification
通过4-(3-甲基-1 H-吲哚-1-基)-1,1-二苯基丁-2-yn的级联碘化反应合成6,9-二氢吡啶并[1,2- a ]吲哚的策略给出了-1-醇衍生物。该反应在非常温和的条件下并且在短时间内进行。该反应不含金属,对环境无害,产率高达94%。而且,所获得的卤化物允许通过钯催化的偶联反应使官能团多样化,其可以用作合成有价值的化合物的潜在中间体。
Benzene construction <i>via</i> Pd-catalyzed cyclization of 2,7-alkadiynylic carbonates in the presence of alkynes
作者:Yuchen Zhang、Wangteng Wu、Chunling Fu、Xin Huang、Shengming Ma
DOI:10.1039/c8sc04681f
日期:——
chemo-selective cyclization of 2,7-alkadiynylic carbonates with functionalized alkynes to construct 1,3-dihydroisobenzofuran and isoindoline derivatives under mild conditions has been developed. Functional groups such as alcohol, sulfonamide, and indoles could be well tolerated. After careful mechanistic studies, a mechanism involving oxidative addition and regioselectivity-defined double alkyne insertions has
A copper-catalyzed oxidative cyclization procedure has been developed for the production of 2-sulfonated 9H-pyrrolo[1,2-a]indol-9-ones via the direct sulfonylation of N-propargyl-substituted indoles with sulfonylhydrazides and tert-butyl hydroperoxide (TBHP). This novel protocol, which tolerates a broad range of functional groups, offers a simple, efficient, and atom-economical route to a series of
已经开发了一种铜催化的氧化环化程序,用于通过磺酰肼和叔丁基直接将N-炔丙基取代的吲哚进行磺酰化来生产2-磺化的9 H-吡咯并[1,2 - a ]吲哚-9-酮。氢过氧化物(TBHP)。这种新颖的方案可耐受多种官能团,在温和的条件下,以高收率提供了一系列简单,高效且原子经济的途径来合成一系列芴酮。
Synthesis and In-vitro Antitumor Activity of 1-[3-(Indol-1-yl)prop-1-yn-1-yl]phthalazines and Related Compounds
A series of novel 3-(indol-1-yl)prop-1-yn-1-yl-substituted phthalazines and related azines was prepared via a concise pathway by palladium-catalyzed cross-coupling of appropriate halo-azines and N-propargylindoles. Some of the compounds exhibited significant antitumoractivity in an in-vitro assay.
Intramolecular [4+2] cycloaddition reactions of indolylalkylpyridazines: synthesis of annulated carbazoles
作者:Norbert Haider、Johann Käferböck
DOI:10.1016/j.tet.2004.06.008
日期:2004.7
Mono- and bicyclic 1,2-diazines tethered to indole dienophiles by alkylene chains were found to undergo thermally induced intramolecular Diels–Alder reactions with inverse electron demand, affording tetra- and pentacyclic condensed carbazoles.