G. Dujardin et Jm. Poirier, MICHAEL ADDITION OF AROMATIC HETEROCYCLIC -COMPOUNDS TO ALPHA-BETA-UNSATURATED KETONES - 3-OXOALKYLATION OF FURANS, INDOLES AND THIOPHENES, Bulletin de la Societe chimique de France, 131(8), 1994, pp. 900-909
The Lewis-acid-catalyzed Michael-type addition of aromatic heterocycli
c compounds, such as furans, indoles and thiophenes, to alpha,beta-uns
aturated ketones (including methyl vinyl ketone) was performed in mild
conditions in the presence of boron trifluoride etherate and an alcoh
ol. Rosethiophene was prepared in a synthesis involving a few steps.