Methyl malonyl chloride → HCID 67251426, compound

Participants

Reaction Steps

2-Methylthio-4-(2-trimethylsilylethoxy)pyrimidine-5-carbohydrazide [Compound (E) in which R1 represents 2-trimethylsilylethoxy] (1.00 g, 3.33 mmol) obtained in Step 3 of Reference Example 3 was dissolved in chloroform (10 mL), and a saturated aqueous sodium hydrogencarbonate solution (10 mL) was added thereto. While stirring the mixture under ice-cooling, a chloroform (10 mL) solution of methyl chlorocarbonylacetate (0.477 g, 3.50 mmol) was added to the mixture, and was stirred at the same temperature for 1 hour. After completion of the reaction was confirmed by thin-layer chromatography, the reaction mixture was separated into organic layer and aqueous layer. The aqueous layer was extracted with chloroform and the extract was combined with the organic layer. The organic layer was washed with saturated brine and dried over anhydrous magnesium sulfate, and then the solvent was evaporated under reduced pressure to give crude N′-acetoxymethylcarbonyl-2-methylthio-4-(2-trimethylsilylethoxy)pyrimidine-5-carbohydrazide [Compound (G) in which R1 is 2-trimethylsilylethoxy, and R3B represents acetoxymethyl].

Provenance & Evidence