Four-component quinazoline synthesis from simple anilines, aromatic aldehydes and ammonium iodide under metal-free conditions
作者:Jinjin Chen、Dan Chang、Fuhong Xiao、Guo-Jun Deng
DOI:10.1039/c8gc02654h
日期:——
A four-component procedure for the preparation of substituted quinazolines from anilines, aromaticaldehydes and ammonium iodide is described. The C–H bond ortho to the amino group in anilines was directly functionalized undermetal-freeconditions. Two aldehydes were involved in this reaction and ammonium iodide was used as one of the nitrogen sources. This reaction provides a strategy for the facile
The first example of the palladium-catalyzed, three-component tandem reaction of 2-aminobenzonitriles, aldehydes, and arylboronic acids has been developed, providing a new approach for one-pot assembly of diverse quinazolines in moderate to good yields. A noteworthy feature of this method is the tolerance of bromo and iodo groups, which affords versatility for further synthetic manipulations. Preliminary
Rhodium-Catalyzed Regioselective Direct C-H Amidation of 2,4-Diarylquinazoline with Sulfonyl Azides: An Example of Steric Hindrance Regulated Mono- and Diamidation Selectivity
An unprecedented sterichindrance controlled regioselectiverhodium-catalyzeddirectC–Hamidation of 2,4-diarylquinazoline was described. Sulfonylazides were used as the amine source to provide a variety of amide-functionalized 2,4-diarylquinazolines in high efficiency. The reaction proceeded under mild conditions, had good functional group tolerance with a broad scope of substrates, and afforded
Ru(II)-Catalyzed C–H Activation and Annulation Reaction via Carbon–Carbon Triple Bond Cleavage
作者:Rashmi Prakash、Bidisha R. Bora、Romesh C. Boruah、Sanjib Gogoi
DOI:10.1021/acs.orglett.8b00643
日期:2018.4.20
An unprecedented Ru(II)-catalyzed C–H activation and annulation reaction, which proceeds via C–C triple bond cleavage, is reported. This reaction of 2-phenyldihydrophthalazinediones with alkynes, which works most efficiently in the presence of bidented ligand 1,3-bis(diphenylphosphino)propane, affords good yields of substituted quinazolines.
Copper‐Catalyzed Three‐Component Cascade Reaction of Benzaldehyde with Benzylamine and Hydroxylamine or Aniline: Synthesis of 1,2,4‐Oxadiazoles and Quinazolines
作者:Chao Wang、Xiyan Rui、Dongjuan Si、Rupeng Dai、Yueyue Zhu、Hongmei Wen、Wei Li、Jian Liu
DOI:10.1002/adsc.202001535
日期:2021.6.8
The analogous three-component synthesis strategy for substituted 1,2,4-oxadiazole and quinazoline derivatives from readily available benzaldehyde, benzylamine and hydroxylamine or aniline has been developed. Both the cascade reaction sequences involves nucleophilic addition of C−N bond, introduction a halogen donor, nucleophilic substitution and Cu(II)-catalyzed aerobic oxidation. This synthesis methodology