Sodium Hydroxide → HCID 86703978, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 4-[1-methyl-4-(1-methylpiperidin-4-yloxy)-9,10-dihydro-4H-3,10a-diaza-benzo[f]azulen-2-yl]-phenylamine (example 173) (50 mg, 0.124 mmole) in CH2Cl2 (0.5 mL) is added 4-dimethylaminopyridine (17 mg, 0.136 mmole). The reaction mixture is cooled to 0° C. and isobutylchloroformate (18 μL, 0.136 mmole) is added dropwise. The reaction mixture is stirred at room temperature 2 h, diluted with water and made alkaline with 1N NaOH. The aqueous phase is extracted three times with CH2Cl2. The organic phase is dried over magnesium sulphate, filtered and the solvent is removed under reduced pressure. The residue is purified by preparative TLC over silica gel eluting with (acetone:NEt3) to afford {4-[1-methyl-4-(1-methyl-piperidin-4-yloxy)-9,10-dihydro-4H-3,10a-diaza-benzo[f]azulen-2-yl]-phenyl}-carbamic acid isobutyl ester melting at 196° C.

Provenance & Evidence