2-Methylfurans were prepared by an effective cyclization of 1-alkyn-5-ones in the presence of mercuric triflate as the catalyst under very mild reaction conditions with high catalytic turnover up to 100 times. Benzene, toluene, or dichloromethane was the solvent of choice.
A mild synthesis of substituted furans from γ-hydroxy-α,β-unsaturated ketones
作者:Douglas M Sammond、Tarek Sammakia
DOI:10.1016/0040-4039(96)01316-0
日期:1996.8
The acid-catalyzed cyclodehydration of (Z)- and (E)-γ-hydroxy-α,β-unsaturated ketones to furans is described. In the case of E olefins, photochemical trans- to cis- olefin isomerization was found to accelerate the reaction.