Application of a 2-aryl indenylphosphine ligand in the Buchwald–Hartwig cross-coupling reactions of aryl and heteroaryl chlorides under the solvent-free and aqueous conditions
An efficient solvent-free protocol for the Buchwald–Hartwig cross-coupling reaction of aryl and heteroaryl chlorides with primary and secondary amines using the Pd(dba)2/ligand 1 catalytic system has been developed. Notably, the catalytic system also efficiently catalyzed the reaction under aqueous conditions.
A protocol for the one-pot synthesis of diarylamines via Smilesrearrangement under microwave irradiation has been developed. Various diarylamines were effectively synthesized starting from readily available substituted phenols, arylamines and chloroacetyl chloride in moderate to good yields (58–92%).
Synthesis of Diarylamines and Methylcarbazoles and Formal Total Synthesis of Alkaloids Ellipticine and Olivacine
作者:Edson Barrera、R. Israel Hernández‐Benitez、Carlos A. González‐González、Carlos H. Escalante、Aydeé Fuentes‐Benítes、Carlos González‐Romero、Elvia Becerra‐Martínez、Francisco Delgado、Joaquín Tamariz
DOI:10.1002/ejoc.202200364
日期:2022.6.27
A versatile and efficient methodology for the synthesis of 1-methyl and 1,4-dimethyl 3-formylcarbazoles is described. Microwave-promoted one-pot cascade reactions of 4-oxazolin-2-ones afforded methylated diarylamines, which were cyclized into a series of carbazoles, including the formaltotalsynthesis of the naturally occurring pyrido[4,3-b]carbazole alkaloids ellipticine and olivacine.
描述了一种用于合成 1-甲基和 1,4-二甲基 3-甲酰基咔唑的通用且有效的方法。微波促进 4-恶唑啉-2-酮的一锅级联反应得到甲基化二芳基胺,将其环化成一系列咔唑,包括天然存在的吡啶并[4,3- b ]咔唑生物碱玫瑰树碱的正式全合成和橄榄素。
Pyrrole-2-carboxylic Acid as a Ligand for the Cu-Catalyzed Reactions of Primary Anilines with Aryl Halides
作者:Ryan A. Altman、Kevin W. Anderson、Stephen L. Buchwald
DOI:10.1021/jo8008676
日期:2008.7.1
Pyrrole 2-carboxylic acid (L5) was found to be an effective ligand for the Cu-catalyzed monoarylation of anilines with aryl iodides and bromides. Under the reported conditions (10% CuI/20% L5/DMSO/K(3)PO(4)/80-100 degrees C/20-24 h), a variety of useful functional groups were tolerated, and moderate to good yields of the diaryl amine products were obtained.
Aliphatic CH, N-insertion versus aromatic N-substitution in the reaction of arylnitrenium-boron trifluoride complexes with methylated benzenes