Synthetic Equivalents Based on Weinreb Amide Functionality for Convenient Access to Monoprotected α-Diketones
作者:Indrapal Aidhen、Sivaraman Balasubramaniam
DOI:10.1055/s-2007-973882
日期:2007.4
A convenient new strategy for the synthesis of monoprotected α-diketones has been achieved. The strategy is based on the use of hitherto unreported N-methoxy- N-methyl-1,3-dithiolane-2-carboxamide and N-methoxy- N-methyl-1,3-dithiane-2-carboxamide as synthetic equivalent for an α-dicarbonyl unit with opposing polarity. Nucleophilic addition on the amide functionality followed by alkylation furnished
A successful strategy based on the synthetic equivalent containing Weinrebamide functionality for the convenientaccess to 1,1-diarylethenes in general and for the isocombretastatin analogues in particular has been developed from the commercially available glyoxalic acid. The convenience with which the structural variations can be made in assembling the aryl residues shows generality associated with