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A new route to luminescent derivatives of androgenic steroids containing a ketone group in the 3or 17-position has been developed. Reaction with the fac-Re(CO) 3 Cl complex of 3,3'-diamino-2,2'bipyridine (complex 1) afforded a cyclic aminal product with different steroids. The rate of reaction and yield varies according to the conjugation or steric hindrance around the ketone group.doi:10.1039/c2dt31476b pmid:23059830 fatcat:5rtqfr75cjf4xixbvvh3rt2jbm