Quinoline → Isoquinoline

Participants

Reaction Steps

15 ml of the remaining reaction solution were diluted with a 5% sodium chloride solution to 30 ml (corresponds to 0.5% solution calculated as cephalosporin C). After adding 0.22 ml of quinoline to the solution, the mixture was adjusted to pH 3.0 and stirred at 5°-10° C. Very soon crystals separated out. The crystals were collected after an hour, washed with ice-water and with ethyl acetate and dried in vacuo. 226 mg of isoquinoline adduct of N-methylthioacetyl-cephalosporin C having 97% purity were obtained.

Provenance & Evidence