Trichloroacetic Acid → ASTA-Z-7654(free acid)

Participants

Reaction Steps

1.4 g (5 mmol) of 4-hydroxycyclophosphamide and 1.2 g (5 mmol) of cyclohexylammonium-2-mercaptoethanesulphonate were dissolved together with a trace of trichloroacetic acid in 25 ml of methanol and were left to stand overnight in a refrigerator at -25° C. The reaction solution was then concentrated to about 5 ml, ether was added until clouding commenced and the mixture was triturated. The crystallised material was filtered with suction after standing for 20 hours at 0° C., and was washed and dried.

Provenance & Evidence