Vinyl Cyclopropanes [3+2]

Thomas Pettus and co-workers at UC Santa Barbara have recently published in SYNLETT on an interesting [3+2] cycloaddition that gives rise to five membered rings.  The dipolarophile, 1,1-dialkoxy-2-methylenecyclopropane (DCMP), they use in this paper is what’s interesting and the reaction procedure just requires heating it with its enone partner.

 

SYNLETT paper