Silver(I) Ion-mediated Desulfurization-Cyclization of Isothiocyanates with Several Hydroxy Acids and N-Substituted Amino Acids
摘要:
The title reaction of 2-hydroxy-2-methylpropionic acid with phenyl isothiocyanate gave 5,5-dimethyl-3-phenyl-2,4-oxazolidinedione. The structure was determined by X-Ray crystal analysis, and the reaction pathway was estimated. The reactions of other 2-hydroxylacids with isothiocyanates also gave some 2,4-oxazolidinediones in good yields. 3-Hydroxybutyric acid, salicylic acid, 3-hydroxy-2-naphthoic acid, and 3-hydroxypyridine-2-carboxylic acid afforded the corresponding cyclic products through the desulfurization-cyclization with isothiocyanate, respectively. N-Substituted amino acids gave several imidazolidine-2,4-diones in the same way.
The title reaction of 2-hydroxy-2-methylpropionic acid with phenyl isothiocyanate gave 5,5-dimethyl-3-phenyl-2,4-oxazolidinedione. The structure was determined by X-Ray crystal analysis, and the reaction pathway was estimated. The reactions of other 2-hydroxylacids with isothiocyanates also gave some 2,4-oxazolidinediones in good yields. 3-Hydroxybutyric acid, salicylic acid, 3-hydroxy-2-naphthoic acid, and 3-hydroxypyridine-2-carboxylic acid afforded the corresponding cyclic products through the desulfurization-cyclization with isothiocyanate, respectively. N-Substituted amino acids gave several imidazolidine-2,4-diones in the same way.