Rapid Access to Thiolactone Derivatives through Radical-Mediated Acyl Thiol–Ene and Acyl Thiol–Yne Cyclization
作者:Ruairi O. McCourt、Fabrice Dénès、Goar Sanchez-Sanz、Eoin M. Scanlan
DOI:10.1021/acs.orglett.8b00996
日期:2018.5.18
A new synthetic approach to thiolactones that employs an efficient acyl thiol–ene (ATE) or acyl thiol–yne (ATY) cyclization to convert unsaturated thiocarboxylic acid derivatives into thiolactones under very mild conditions is described. The high overall yields, fast kinetics, high diastereoselectivity, excellent regiocontrol, and broad substrate scope of these reaction processes render this a very
Thermal decomposition of methylated γ-thiobutyrolactones: a photoelectron spectroscopic study
作者:Yek Tann Chua、Chupp Yew Mok、Hsing Hua Huang、Igor Novak、Siu Choon Ng
DOI:10.1039/p29960000577
日期:——
The thermaldecomposition of γ-thiovalerolactone, α-methyl-γ-thiobutyrolactone and β-methyl-γ-thiobutyrolactone has been studied in a gaseous flow system, by monitoring the changes in the photoelectron spectra recorded during the course of the reactions. Three modes of decomposition were observed, two involve loss of carbon monoxide (decarbonylation) and one involves loss of carbonyl sulfide (decarboxylation)
Catalytic synthesis of thiobutyrolactones via CO insertion into the C–S bond of thietanes in the presence of a heterodinuclear organoplatinum–cobalt complex
Heterodinuclear organoplatinum-cobalt complex having a 1,2-bis(diphenylphosphino)ethane ligand (dppe)MePtâCo(CO)4 catalyzes CO insertion into the CâS bond of thietanes in THF at 100 °C under 1.0 MPa of CO for 2 h to give γ-thiobutyrolactone in quantitative yield.