An unprecedented reaction between indolin-2-ones and α-substituted ketones has been developed. Using this protocol, a wide range of biologically important 3-hydroxy-3-phenacyloxindole derivatives could be obtained in good yield (up to 93%) under mild reaction conditions. A possible mechanism of this reaction was tentatively proposed based on some control experiments and MS spectrometry analysis.
Synthesis of Thiazoles and Aminothiazoles from β‐Keto Tosylates under Supramolecular Catalysis in the Presence of β‐Cyclodextrin in Water
作者:V. Pavan Kumar、M. Narender、R. Sridhar、Y. V. D. Nageswar、K. Rama Rao
DOI:10.1080/00397910701575913
日期:2007.11
Abstract This is the first report on the supramolecular synthesis of thiazoles/aminothiazoles from β‐keto tosylates and thioamide/thiourea in water in the presence of β‐cyclodextrin in impressive yields. Formation of inclusion complexes was explained from 1H NMR studies.
Diastereoselective Alkene Hydroesterification Enabling the Synthesis of Chiral Fused Bicyclic Lactones
作者:Zhanglin Shi、Chaoren Shen、Kaiwu Dong
DOI:10.1002/chem.202103318
日期:2021.12.23
alkenes afforded chiral γ-butyrolactones bearing two stereocenters. Employing the carbonylation products as key intermediates, the route from alkenes with single chiral center to chiral THF-fused bicyclic γ-lactones containing three stereocenters was developed.
Iodobenzene‐catalyzed synthesis of α‐azidoketones and α‐thiocyanatoketones fromarylketones with MCPBA as a cooxidant is described. The method is simple, rapid and practical, generating α‐azidoketones and α‐thiocyanatoketones from the arylketone without isolation of α‐tosyloxyketones in good to excellent yields.
2,4,6-Tris(4-iodophenoxy)-1,3,5-triazine as a new recyclable “iodoarene” for in situ generation of hypervalent iodine(III) reagent for α-tosyloxylation of enolizable ketones
作者:Prerana B. Thorat、Bhagyashree Y. Bhong、Amol V. Shelke、Nandkishor N. Karade
DOI:10.1016/j.tetlet.2014.04.052
日期:2014.5
The synthesis of 2,4,6-tris[(4-iodo)phenoxy)]-1,3,5-triazine 6, as a new recyclable nonpolymeric analogue of iodobenzene is achieved using the reaction of 2,4,6-trichloro-1,3,5-triazine with 4-iodophenol in the presence of KOH. The application of 6 as a recyclable ‘iodoarene’ is demonstrated for α-tosyloxylation of enolizable ketones via in situ generation of hypervalent iodine(III) species using PTSA