Synthesis of 4-hydroxy-2-oxazolidinone derivatives was accomplished from the reaction of α-hydroxy ketones with isocyanates in the presence of a catalytic amount of a tinalkoxide. The reactions proceeded under mild conditions and are highly atom economical.
Short and Efficient Synthesis of 3-Substituted 4-Oxazolin-2-thiones and Their Reactivity
作者:Joaquín Tamariz、Carlos González-Romero、Rafael Martínez-Palou、Hugo A. Jiménez-Vázquez、Aydeé Fuentes、Fabiola Jiménez
DOI:10.3987/com-06-10919
日期:——
A new synthesis of the substituted 4-oxazolin-2-thiones (1) and (14) is described by a regioselective tandem condensation reaction between α-ketols (4a-4b) and isothiocyanates (8). The use of dioxane as the solvent promotes the formation of the 4-methylene-1,3-oxazolidin-2-thiones (7), while the mixture of hemiaminals (9/10) is obtained in the presence of DMF; this mixture undergoes dehydration to