191476-68-3Relevant articles and documents
Synthesis of alkylidenecyclopropanes via thermal cycloreversion of α-spirocyclopropyl-β-lactones
Danheiser, Rick L.,Lee, Thomas W.,Menichincheri, Maria,Brunelli, Steven,Nishiuchi, Masaki
, p. 469 - 470 (2007/10/03)
An efficient two-step synthesis of alkylidenecyclopropanes is reported based on the addition of metallated cyclopropyl thiol esters to carbonyl compounds. Thermolysis of the resulting α-spirocyclopropyl-β-lactones at 105-150°C induces thermal [2+2] cycloreversion to furnish alkylidenecyclopropanes in good yield.