Ammonia → 1,4-Dihydroxy-5,8-bis[2-(2-hydroxypropylamino)ethylamino]anthracene-9,10-dione

Participants

Reaction Steps

A mixture of 6.0 g of 1,4-dihydroxy-5,8-bis[[2-[(2-hydroxypropyl)amino]ethyl]amino]anthraquinone dihydrochloride (prepared as described in Example 32 of U.S. Pat. No. 4,197,249) and 60 ml of methanol is treated with ammonia gas according to the procedure of Example 1 to give the corresponding free base, 1,4-dihydroxy-5,8-bis[[2-[(2-hydroxypropyl)amino]ethyl]amino]-anthraquinone.

Provenance & Evidence