Vinylcarbenes acycliques: reactions de cycloadditions intermoleculaires
作者:M. Franck-Neumann、C. Dietrich-Buchecker
DOI:10.1016/0040-4020(78)88422-1
日期:1978.1
3-dimethyl-3H-pyrazoles in unsaturated solvents leads in good yields and often with high stereoselectivity, to vinylcarbene cycloadducts. This direct synthesis of vinylcyclopropanes, vinylcyclopropenes and divinylcyclopropanes shows that acyclic vinyl carbenes are not necessarily intramolecularly stabilized. They can actually be trapped by olefins, acetylenes or dienes, depending on the carbene substituents. Cyano