Boron trifluoride and indium(III) trifluoromethanesulfonate were found to efficiently catalyse the isomerisation of thionolactones to thiolactones in good yields. When applied to an optically active γ-thionolactone, the isomerisation reaction proceeded with a complete inversion of configuration by using BF3·Et2O.
A series of gamma-thionolactones was synthesized, with good yields, using a new combination of Lawesson's reagent (LR) and hexamethyldisiloxane (HMDO) in solvent-free conditions under microwave irradiation. (C) 2003 Elsevier Ltd. All rights reserved.
AQUEOUS COMPOSITION COMPRISING A COMPOUND OF THIOLACTONE TYPE AND A SILICONE AND PROCESS FOR TREATING KERATIN MATERIALS WITH THE COMPOSITION
申请人:L'Oreal
公开号:US20200030215A1
公开(公告)日:2020-01-30
The present invention relates to a composition comprising: (a) one more compound(s) of thiolactone type, and (b) one or more silicones.
A Reaction of Triazoles with Thioesters to Produce β‐Sulfanyl Enamides by Insertion of an Enamine Moiety into the Sulfur–Carbonyl Bond
in a stereoselective manner. The reaction proceeds through generation of an α‐imino rhodium carbene complex, nucleophilic addition of the sulfur atom of a thioester onto the carbenoid carbonatom, and subsequent intramolecular migration of the acyl groupfrom the sulfur atom to the imino nitrogen atom. The method is successfully applied to a ring‐expansion reaction of thiolactones, thus leading to
Analytical and Sensory Characterization of γ- and δ-Thiolactones
作者:Irmgard Roling、Hans-Georg Schmarr、Wolfgang Eisenreich、Karl-Heinz Engel
DOI:10.1021/jf970748+
日期:1998.2.1
gamma-Thiolactones [5-alkyldihydro-2(3H)-thiophenones] and delta-thiolactones (6-alkyltetrahydro-2H-thiopyran-2-ones) were synthesized via isothiouroniumsalts by reaction of the corresponding oxygen-containing lactones with thiourea and hydrobromic acid. The identity of the compounds was confirmed by means of IR, MS, and (1)H and (13)C NMR. Separation of the enantiomers of the thiolactones was achieved