Tandem Double Intramolecular [4 + 2]/[3 + 2] Cycloadditions of Nitroalkenes
作者:Scott E. Denmark、Laurent Gomez
DOI:10.1021/ol016385n
日期:2001.9.1
[reaction: see text]. A new class of tandem [4 + 2]/[3 + 2] cycloadditions of nitroalkenes is described in which both pericyclic processes are intramolecular. Two subclasses of intra [4 + 2]/intra [3 + 2] cycloadditions have been explored in which the dipolarophile is tethered at either C(5) or C(6) of the nitronate. For both families of precursors, the cycloadditions occur in good yield and are found