Synthesis of new acyl, furoyl, and benzoylthiocarbamates as polydentate systems. Structural study of isopropyl N-(2-furoyl)thiocarbamate
作者:Ana M. Plutín、Margarita Suárez、Estael Ochoa、Teresita Machado、Raúl Mocelo、José M. Concellón、Humberto Rodríguez-Solla
DOI:10.1016/j.tet.2005.04.018
日期:2005.6
Synthesis of new acylthiocarbamates has been carried out. To establish the preferential conformation and to explain the behaviour chemically, the structure of isopropyl N-(2-furoyl)thiocarbamate 3m has been determined by single-crystal X-ray analysis. The most stable conformation E,Z′ established by X-ray analysis was corroborated by semiempirical theoretical calculations.
The methylation reaction of alkyl N-acylthiocarbamates in DMF with dimethyl sulfate in the presence of potassium carbonate takes place with high selectivity affording the S-methylated derivative as the principal reaction product. No isomeric reaction products derived from the N- or the O-methylation were isolable. The new carbonimidothioates 3a-g synthesised were fully characterized by spectroscopic