HCID 86650132, compound → HCID 136013426, compound

Participants

Reaction Steps

A suspension of 4,4,4-trifluoro-1-(8-hydroxy-6-oxo-5,6-dihydro-pyrido[2,3-b]pyrazin-7-yl)-butane-1,3-dione 3-oxime (Example 6.4) (0.068 g) in trifluoroacetic acid (“TFA”) (0.5 ml) was heated to reflux for 7 hours. The solid was isolated by filtration and washed with diethyl ether and then dried. The solid was heated to reflux again in trifluoroacetic acid (“TFA”) (2.0 ml) for 2 days and worked up similarly to give Compound No. B10 of Table B (0.050 g).

Provenance & Evidence