A New Synthesis of 3-Substituted Indolines and Indoles
摘要:
3-Phenyl- and 3-alkyl-3-hydroxyindolines were synthesized by intramolecular Barbier reaction of phenyl and alkyl N-(2-iodophenyl)-N-methylaminomethyl ketones with n-BuLi, which were easily prepared from N-methyl-2-iodoaniline and bromomethyl ketones. The treatment of the indolines with acid gave the corresponding indoles in quantitative yields.
N-Bromosuccinimide promoted and base switchable one pot synthesis of α-imido and α-amino ketones from styrenes
作者:Mahesh H. Shinde、Umesh A. Kshirsagar
DOI:10.1039/c5ob02034d
日期:——
N-Bromosuccinimide (NBS) promoted one pot strategy for the synthesis of α-amino functionalized aryl ketones starting from commercially available styrenes has been developed. NBS participates in multiple tasks, such as bromonium ion formation, oxidation of bromohydrin and providing a nucleophilic nitrogen source. The reaction can easily be switched between α-imido and α-amino ketones by the choice of base
Synthesis of α-Keto Amides by a Pyrrolidine/TEMPO-Mediated Oxidation of α-Keto Amines
作者:Peter Somfai、Lu Yu
DOI:10.1055/s-0035-1562541
日期:——
A mild procedure has been developed for the synthesis of α-keto amides by α-oxidation of the corresponding α-keto amines mediated by pyrrolidine and TEMPO. The method can also be applied to the synthesis of α-keto thioamides and α-keto amidines.
已经开发了一种温和的程序,用于通过吡咯烷和 TEMPO 介导的相应 α-酮胺的 α-氧化来合成 α-酮酰胺。该方法也可用于α-酮硫代酰胺和α-酮脒的合成。
HFIP-Promoted Bischler Indole Synthesis under Microwave Irradiation
1,1,1,3,3,3-Hexafluoropropan-2-ol (HFIP) was found to be effective for the Bischler indole synthesisundermicrowaveirradiation in the absence of a metal catalyst. Under the catalysis of HFIP, a wide range of α-amino arylacetones were successfully transformed into indole derivatives with moderate to good yields.
A protocol for the copper-catalyzed oxidative self-coupling of α-amino carbonylcompounds has been developed for the synthesis of tetrasubstituted 1,4-enediones (Z-isomers) in moderate to good yields through the cleavage of four sp3C–H bonds and the simultaneous formation of one C=C double bond in the α-amino carbonylcompound. The strategy has the advantages of using readily available starting materials
Cu(OAc)2 and acids promoted the oxidative cleavage of α-aminocarbonyl compounds with amines: efficient and selective synthesis of 2-t-amino-2-imino-carbonyl and 2-amino-2-oxocarbonyl
method for the synthesis of 2-t-amino-2-imino-carbonyl (C) and 2-amino-2-oxocarbonyl (D) compounds has been discovered through a copper-promoted oxidating amidation reactions between α-amino -carbonyl compounds and amines. Promoted by the crucial copper species, perfect selectivity and good to excellent yields could be achieved. This transformation is achieved through CN bond oxidative cleavage and formation