ABSTRACT A mixed bases mediated protocol is developed to synthesize thioamides from N-aryl or N-alkylamide, aldehyde and elemental sulfur in water. This reaction requires no addition of external oxidant and avoids large excess of amides. Various functional groups and pharmaceutically interesting heteroaromatic rings could be introduced via this efficient procedure. GRAPHICAL ABSTRACT
Selective carbophilic addition of organolithiums to thioamides. A novel synthesis of unsymmetrical ketones and α-alkylated amines
作者:Yoshinori Tominaga、Shinya Kohra、Akira Hosomi
DOI:10.1016/s0040-4039(01)81034-0
日期:1987.1
Thioamides, readily available from aldehydes, sulfur and secondary amines, can be converted to unsymmetrical ketones by the carbophilic addition of organolithiums to the thiocarbonyl group. Reduction of the intermediates with lithiumaluminumhydride gives α-alkylated or α-arylated amines.
Several straightforward and practical processes have been established for the construction of 2-aminothiazoles, 1,3-thiazoles and 1,3-selenazoles from aryliodoazides. These strategies successfully proceed with a wide spectrum of substituted thioamides and its derivatives producing the resulting five-membered heterocycles obtained in satisfactory yields. The unique features of these protocols are operational
Willgerodt-Kindler reaction at room temperature: Synthesis of thioamides from aromatic aldehydes and cyclic secondary amines
作者:Arun D. Kale、Yogesh A. Tayade、Sachin D. Mahale、Rahul D. Patil、Dipak S. Dalal
DOI:10.1016/j.tet.2019.130575
日期:2019.10
out Willgerodt-Kindlerreaction of aromatic aldehydes at room temperature. At 120 °C, it is catalyst free reaction with lower reaction time whereas at room temperature, due to the additional amine molecule, Willgerodt-Kindlerreaction of aromatic aldehydes is successfully carried out at room temperature. On gram-scale, the reaction is successfully attempted under both conditions with good yields.
Direct and Efficient Conversion of Tertiary Thioamides to S-2-Oxo Thioesters under Solvent-free Conditions
作者:Hassan Zali Boeini、Aida Khajeh
DOI:10.5012/bkcs.2011.32.4.1201
日期:2011.4.20
A one-pot conversion of tertiary thioamides to S-2-oxo thioesters is reported. Hence, tertiary thioamides were reacted with $\alpha}$-halo ketones or acids under solvent-free conditions to produce the corresponding oxo-thioesters in good to excellent yields.