Thermolysis of a spiro-fused oxadiazoline: The carbonyl ylidecyclic carbenediradical sequence
作者:Nadine Merkley、John Warkentin
DOI:10.1139/v02-126
日期:2002.9.1
Thermolysis of spiro-fused oxadiazoline 1 in benzene led to loss of N2 to form a carbonyl ylide intermediate. Most of the ylide fragmented to acetone and 4-phenyl-1,3-dioxane-2-ylidene, which could be trapped with tert-butyl alcohol. In the absence of the trapping agent, the major pathway followed by the carbene was fragmentation to a diradical, 5-phenyl-2-oxa-1-oxo-1,5-pentanediyl. The latter diradical