Dicyclohexylcarbodiimide → HCID 131711649, compound

Participants

Reaction Steps

To 8 ml of methylene chloride were added 0.37 g of phenylsulfinylacetic acid of the R form ([α]D20 :+183°, C=1.00, ethanol) and 0.41 g of dicyclohexylcarbodiimide, and the mixture was agitated at room temperature for 1.5 hours. Then, a solution consisting of 0.69 g of 7-amino-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid, 0.28 ml of triethylamine and 8 ml of methylene chloride was added to the above mixture, and the resulting mixture was agitated at room temperature overnight. The reaction mixture was filtered, and the filtrate was post-treated in the same manner as described in Example 19 to obtain 0.17 g of 7-(phenylsulfinylacetamido)-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid of the R form, the IR and NMR spectra of which were found to be in agreement with those of the intended product.

Provenance & Evidence