Catalytic and Regioselective Ring Expansion of Arylcyclobutanones with Trimethylsilyldiazomethane. Ligand-Dependent Entry to β-Ketosilane or Enolsilane Adducts
摘要:
Divergent reactivity is uncovered in the homologation of arylcyclobutanones with trimethylsilyldiazomethane. With Sc(OTf)(3) as catalyst, enolsilanes are obtained with a high preference for methylene migration. By contrast, Sc(hfac)(3) gives beta-ketosilanes with both regio- and diastereocontrol. Each adduct affords the cyclopentanone upon hydrolysis.
The present invention relates to an aromatic compound and a preparation method therefor and the use thereof. Specifically, disclosed are a compound as shown in the following general formula (I), or a tautomer, an enantiomer, a diastereomer or a racemate thereof or a mixture thereof, or a pharmaceutically acceptable salt thereof. Also disclosed are a method for preparing the above compound and the use of same in the treatment of nervous system diseases.
[EN] AROMATIC COMPOUND AND PREPARATION METHOD THEREFOR AND USE THEREOF<br/>[FR] COMPOSÉ AROMATIQUE, SON PROCÉDÉ DE PRÉPARATION ET SON UTILISATION<br/>[ZH] 芳香类化合物及其制备方法和用途
Catalytic and Regioselective Ring Expansion of Arylcyclobutanones with Trimethylsilyldiazomethane. Ligand-Dependent Entry to β-Ketosilane or Enolsilane Adducts
作者:Jennifer A. Dabrowski、David C. Moebius、Andrew J. Wommack、Anne F. Kornahrens、Jason S. Kingsbury
DOI:10.1021/ol101136a
日期:2010.8.20
Divergent reactivity is uncovered in the homologation of arylcyclobutanones with trimethylsilyldiazomethane. With Sc(OTf)(3) as catalyst, enolsilanes are obtained with a high preference for methylene migration. By contrast, Sc(hfac)(3) gives beta-ketosilanes with both regio- and diastereocontrol. Each adduct affords the cyclopentanone upon hydrolysis.