A New Versatile One-Pot Synthesis of Functionalized Thioamides From Grignards, Carbon Disulfide and Amines
作者:Alan R. Katritzky、Jean-Luc Moutou、Zhijun Yang
DOI:10.1055/s-1995-4144
日期:1995.12
The one-pot successive reactions of Grignard reagents with carbon disulfide and amines mediated by 1-trifluoromethylsulfonylbenzotriazole or triflic anhydride, provide and attractive and general route to thioamides. A wide variety of amines (primary alkyl, arylalkyl, secondary alkyl, cyclic amines, aniline, N-substituted anilines, heterocyclic amidines, amino alcohols, amino ethers, amino acetals, amino ketones, amino esters, amino amides (peptides), aminoalkenes, and diamines) and Grignard (primary alkyl, arylalkyl, aryl, secondary alkyl and tertiary alkyl) can be used, and thioamides are generally formed in good to moderate yields.
Direct Thionation and Selenation of Amides Using Elemental Sulfur and Selenium and Hydrochlorosilanes in the Presence of Amines
作者:Fumitoshi Shibahara、Rie Sugiura、Toshiaki Murai
DOI:10.1021/ol9010882
日期:2009.7.16
Reactions of amides with elemental sulfur in the presence of hydrochlorosilanes and amines give the corresponding thioamides in good to high yields. The process takes place via reduction of elemental sulfur by the hydrochlorosilane in the presence of a suitable amine. The methodology can be applied to the selenation of amides by using elemental selenium. Thionation and selenation of an acetyl-protected
Copper-catalyzed oxidative desulfurization–oxygenation of thiocarbonyl compounds using molecular oxygen: an efficient method for the preparation of oxygen isotopically labeled carbonyl compounds
A novel copper-catalyzed oxidative desulfurization reaction of thiocarbonyl compounds, using molecular oxygen as an oxidant and leading to formation of carbonyl compounds, has been developed, and the utility of the process is demonstrated by its application to the preparation of a carbonyl-18O labeled sialic acid derivative.
to a thioamide dianion and subsequent ethylation afforded a N-thioacyl hemithioaminal. NMR studies on the thioamide mono- and dianionsderivedfrom N-benzyl 2-methoxythiobenzamide showed a linear relationship between the chemical shifts of all carbon atoms of thioamide mono- and dianions. The results also suggested that the negative charge at the benzylic carbon atom of the dianion is not fully delocalized