Copper-mediated rapid and facile oxidative dehydrogenation of dihydrobenzocarbazoles
摘要:
Rapid method for the oxidative dehydrogenation of dihydrobenzocarbazoles has been introduced by using bench scale and commercially available reagent; copper chloride, in excellent yield with easy workup. The scope of the reaction has been studied with broad range of substitutes
FISCHER INDOLE SYNTHESIS IN THE ABSENCE OF A SOLVENT
作者:Kiyoshi Matsumoto、Akinori Tanaka、Ikemi Yukio、Naoto Hayashi、Mitsuo Toda、Robert A. Bulman
DOI:10.1515/hc.2003.9.1.9
日期:2003.1
the indole product (4). Over 100 years after the initial discovery, the Fischerindolesynthesis remains the most commonly employed method for the preparation of Indoles (5,6) Since a novel entry into the Fischerindolesynthesis via a palladium-catalyzed strategy for the preparation of hydrazones has recently been developed particularly by Buchwald (7,8), the scope of FischerIndolesynthesis has
The Fischerindolesynthesis was carried out using microwaves instead of conventional heating procedures. When the mixture of phenylhydrazine, cyclohexanone and zinc chloride was irradiated at 600 W for 3 min, 76% of 1,2,3,4‐tetrahydrocarbazole was obtained. However, when zinc chloride was replaced with p‐toluenesulfonic acid (p‐TSA), the reaction yielded 91% of 1,2,3,4‐tetrahydrocarbazole. Thus, a
We developed an environmentally friendly mechanochemical protocol to induce an effective Fischer indolisation to synthesize indoles and indolines taking advantage of oxalic acid and dimethylurea.
alternatives to the common tertiary phosphine/Pd systems, well‐defined N‐heterocyclic carbene–Pd complexes have been proven to be highly efficient precatalysts for intermoleculardirect annalution of o‐haloanilines and ketones at lower catalyst loadings. A highly efficient and practical protocol for synthesis of functionalizedindoles was developed using (IPr)Pd(acac)Cl as catalyst. Both o‐bromoanilines
Copper-mediated rapid and facile oxidative dehydrogenation of dihydrobenzocarbazoles
作者:Vivek T. Humne、Avinash G. Ulhe
DOI:10.1080/00397911.2020.1731757
日期:2020.4.2
Rapid method for the oxidative dehydrogenation of dihydrobenzocarbazoles has been introduced by using bench scale and commercially available reagent; copper chloride, in excellent yield with easy workup. The scope of the reaction has been studied with broad range of substitutes