Potassium Fluoride/Basic Alumina as Far Superior Heterogeneous Catalyst for the Chemoselective Conjugate Addition of Nitroalkanes to Electron-Poor Alkenes Having Two Electron-Withdrawing Groups in α- and β-Positions
作者:Roberto Ballini、Alessandro Palmieri
DOI:10.1002/adsc.200606105
日期:2006.7
The chemoselective, conjugateaddition of nitroalkanes to electron-poor alkenes, with two electron-withdrawing groups in the α- and β-positions, can be easily performed at room temperature under solventlessconditions using potassium fluoride/basicalumina as heterogeneous catalyst.
Nitrocyclopropane formation has been successfully carried outby reaction of bromonitromethane with electrophilic alkenes bearingtwo electron-withdrawing groups in the α- and β-positions,and in the presence of potassium carbonate as base. The method allowsgood yields and moderate to satisfactory diastereoselectivity withlinear alkenes, while shows the complete formation of the exo-product with N-alkylmaleimides.
Capture compounds, collections thereof and methods for analyzing the proteome and complex compositions
申请人:Kõster Hubert
公开号:US20100248264A1
公开(公告)日:2010-09-30
Capture compounds and collections thereof and methods using the compounds for the analysis of biomolecules are provided. In particular, collections, compounds and methods are provided for analyzing complex protein mixtures, such as the proteome. The compounds are multifunctional reagents that provide for the separation and isolation of complex protein mixtures. Automated systems for performing the methods also are provided.