Phthalimidesulfenyl chloride part 6. The First Example of an α-oxothione acting as heterodiene: Synthesis of 2,3-dihydro-1,4-oxathiines.
作者:Giuseppe Capozzi、Stefano Menichetti、Cristina Nativi、Alessandro Rosi、Richard W. Franck
DOI:10.1016/s0040-4039(00)60541-5
日期:1993.6
α-α'-Dioxothione 3a acts as heterodiene undergoing 4+2 cycloaddition reactions with enol ethers with the regiospecific formation of 2,3-dihydro-1,4-oxathiines 5 in good yields. The reaction is very simple and quite general. Using this reaction the thiosugar derivative 5e has been also prepared.
Phthalimidosulfenyl chloride. Part 5. Reaction with enolizable carbonyl compounds and synthesis of functionalized thiones.
作者:Giuseppe Capozzi、Stefano Menichetti、Cristina Nativi、Alessandro Rosi、Giovanni Valle
DOI:10.1016/s0040-4020(01)82000-7
日期:1992.1
β-Ketothio derivatives 4, prepared by reaction of phthalimidosulphenyl chloride with enolizable carbonyl compounds, afford, in presence of pyridine, unstable functionalized thiones which can be trapped with 1,3-dienes to give the corresponding cycloaddition products8and9.