Manganese triacetate oxidation of methyl 1-hydroxy-2-naphthalene carboxylates
作者:Laura Munive、Víctor Gómez-Calvario、Horacio F. Olivo
DOI:10.1016/j.tetlet.2017.05.028
日期:2017.6
Manganese-triacetate mediated oxidation of 1-hydroxy-2-napthalene carboxylates in benzene under anhydrous conditions delivers the dimerized product. However, acetoxylation on the ortho- or para-position, or oxidation to quinones occurs on the 1-hydroxy-3-substituted 2-napthalene carboxylates depending on the nature of the substituents when the reaction is carried out in a mixture of acetic acid/acetonitrile
Rapid access to benzo-annelated heterocycles, naphthalenes, and polysubstituted benzenes through a novel benzannulation reaction
作者:Inga Cikotiene、Rita Buksnaitiene、Rokas Sazinas
DOI:10.1016/j.tet.2010.11.073
日期:2011.1
mercaptoacetate triggered benzannulation reaction is described. The precursors are heterocyclic, aromatic or acyclic compounds bearing a carbonyl group at ortho position to an internal alkyne. The methodology does not require transition-metal catalysts and moreover it is general for the preparation of wide range of benzo-annelated heterocycles, naphthalenes and benzenes.
Pd-Catalyzed Sequential C–C Bond Formation and Cleavage: Evidence for an Unexpected Generation of Arylpalladium(II) Species
作者:So Won Youn、Byung Seok Kim、Arun R. Jagdale
DOI:10.1021/ja304616q
日期:2012.7.18
A Pd(II)-catalyzed reaction engaging alkenyl beta-keto esters is reported that leads to the formation of 1-naphthols and an unexpected generation of arylpalladium-(II) species. Interception of the in situ generated arylpalladium(II) species in a Mizoroki-Heck reaction, together with additional mechanistic studies, provided strong evidence in support of the first aromatization-driven beta-carbon elimination process. A single Pd catalyst served to promote a series of both C-C bond forming and cleavage events in an unprecedented manner.
A useful benzannulation reaction
作者:Marco A. Ciufolini、Trent J. Weiss
DOI:10.1016/0040-4039(94)88003-4
日期:1994.2
[(2-Alkynyl)-benzoyl]-acetate esters undergo cycloaromatization in good yield upon treatment with CSA in refluxing chloroform.
在回流的氯仿中用CSA处理后,[(2-炔基)-苯甲酰基]-乙酸酯以良好的产率进行环芳构化。
Radical-Smiles Rearrangement by a Vitamin B2-Derived Photocatalyst in Water
Herein, we report a catalytic radical-Smiles rearrangement system of arene migration from ether to carboxylic acid with riboflavin tetraacetate (RFT), a readily available ester of natural vitamin B2, as the photocatalyst and water as a green solvent, being free of external oxidant, base, metal, inert gas protection, and lengthy reaction time. Not only the known substituted 2-phenyloxybenzoic acids