Efficient Entry into Medium-Ring Keto-Lactones. The Ruthenium Tetraoxide-Promoted Oxidative Cleavage of β-Hydroxyethers
作者:Helena M. C. Ferraz、Luiz S. Longo
DOI:10.1021/ol0342958
日期:2003.4.1
A new use of ruthenium tetraoxide is reported. The catalytic oxidative cleavage of hexahydro-benzofuran-3a-ols led to nine-membered ring keto-lactones in moderate to good yields and high purity. The reaction is clean and easily performed using catalytic amounts of ruthenium trichloride and an excess of sodium periodate as a cooxidant.
A Short Route to (−)-Mintlactone by Thallium(III)-Mediated Cyclization of (−)-Isopulegol
作者:Helena M. C. Ferraz、Mônica V. A. Grazini、Carlos M. R. Ribeiro、Ursula Brocksom、Timothy J. Brocksom