1,8-Diazabicyclo(5.4.0)undec-7-ene → HCID 10084932, compound

Participants

Reaction Steps

A mixture of the compound obtained in Step 4 (3.0 g), toluene (60 ml) and 1,8-diazabicyclo [5.4.0]undec-7-ene (0.3 ml) was stirred for 30 minutes under reflux. The mixture was cooled, and the crystals separated were collected by filtration, washed with ethyl ether to give 7,8-dihydro-7-methyl-5-(4-methylphenyl)-8-oxo-6-pyrido[3,4-b]pyridinecarboxaldehyde as pale yellow crystals (1.98 g).

Provenance & Evidence