Copper(II) catalyzed aromatization of tetrahydrocarbazole: An unprecedented protocol and its utility towards the synthesis of carbazole alkaloids
作者:Bhakti A. Dalvi、Pradeep D. Lokhande
DOI:10.1016/j.tetlet.2018.01.061
日期:2018.5
protocol for the aromatization of tetrahydrocarbazole is described by using catalytic copper(II) chloride dihydrate in DMSO. This newly established methodology has utilized towards the synthesis of naturally occurring carbazole alkaloids, namely 3-methylcarbazole, 3-formyl carbazole, glycozoline, glycozolicine and clauszoline-K. In addition, the protocol is generalized for the aromatization of N-substituted
Self-assembled multilayer iron(0) nanoparticles (NPs, 6–10 nm), namely, sulfur-modified Au-supported Fe(0) [SAFe(0)], were developed for ligand-free one-pot carbon–carbon/carbon–nitrogen bond-formingreactions. SAFe(0) was successfully prepared using a well-established metal–nanoparticle catalyst preparative protocol by simultaneous in situ metal NP and nanospace organization (PSSO) with 1,4-bis(trimethylsilyl)-1
Visible-light-promoted intramolecular C–H amination in aqueous solution: synthesis of carbazoles
作者:Lizheng Yang、Yipin Zhang、Xiaodong Zou、Hongjian Lu、Guigen Li
DOI:10.1039/c7gc03392c
日期:——
An effective and operationally simpleprotocol is reported for the synthesis of versatile carbazoles. With water as a co-solvent, visible-light rather than various metals is used to facilitate the conversion of readily available 2-azidobiphenyls under mild conditions. Various functionalized bioactive natural alkaloids, such as glycoborine, clausine C, clausine L, clausine H and clauszoline K, were
An Organic Intermolecular Dehydrogenative Annulation Reaction
作者:Saikat Maiti、Tapas Kumar Achar、Prasenjit Mal
DOI:10.1021/acs.orglett.7b00562
日期:2017.4.21
The discovery of a direct method for the synthesis of three-ring heterocyclic carbazoles from unactivated arenes and anilides by a metal-free (organic) intermolecular dehydrogenative annulation reaction under ambient laboratory conditions is reported. Iodine(III) was used as the sole reagent either stoichiometrically from inexpensive phenyliodine diacetate or organocatalytically by in situ generation
报道了在环境实验室条件下通过无金属(有机)分子间脱氢环化反应从未活化的芳烃和苯胺合成三环杂环咔唑的直接方法的发现。碘(III)用作唯一的试剂,从廉价的二乙酸苯基碘二乙酸酯化学计量或从PhI– m CPBA原位生成有机催化。在一个步骤中,两个串联的C–C和C–N键的形成反应就可以从两个不同的芳烃官能化三个C(sp 2)–H键和一个N(sp 3)–H键。
Regiospecific oxidation of an alkyl group of aromatic amine to carbonyl group by DDQ in aq. medium
作者:Madhav S. Mane、Ravi S. Balaskar、Sandip N. Gavade、Pramod N. Pabrekar、Murlidhar S. Shingare、Dhananjay V. Mane
DOI:10.1016/j.cclet.2011.03.016
日期:2011.9
The regiospecific oxidation of alkyl group of both sterically hindered and unhindered aromatic amine to corresponding carbonyl compound was done in aq. medium by using DDQ. The optimized reaction protocol was found to be most simple, high yielding and novel method for oxidation of alkyl group of aromatic amine in to its carbonyl compound.