Copper(I)-Promoted Synthesis of 4-Oxaspiro[2.4]hepta-1,6-dien-5-ones from Cyclopropenones
作者:Rolf Gleiter、Olivia Körner、Frank Rominger
DOI:10.1055/s-0029-1216934
日期:2009.10
Heating of dialkyl- or diarylcyclopropenones at 75 ËC in the presence of copper(I) bromide (5 mol%) affords the corresponding 4-oxaspiro[2.4]hepta-1,6-dien-5-ones in good yields.