Methanol → HCID 86601718, compound

Participants

Reaction Steps

1.92 g (4.5 mmole) of 2-[3,5-di(tert-butyl)-4-hydroxyphenoxy]-N-(4-nitrophenetyl)acetamide (synthesis intermediate of compound 47) is introduced into 80 ml of anhydrous THF in a flask, under an argon atmosphere. A solution of 13.45 ml (13.45 mmole) of BH3 in THF is added to the reaction mixture and the mixture is agitated while heating at reflux for 4 hours 30 minutes. At the end of the reaction, 10 ml of MeOH is added and heating is maintained for a further 30 minutes. The reaction mixture is then concentrated under vacuum, the residue is taken up in 30 ml of a MeOH/HCl 3N mixture (2/1) and the mixture is taken to reflux for another hour. The reaction mixture is returned to 22° C., diluted with 50 ml of CH2Cl2 and 2M aqueous soda is added until a basic pH is obtained. After decantation, the organic phase is washed successively with 20 ml of water and 20 ml of brine, dried over sodium sulphate, filtered and concentrated under vacuum. The expected product is purified by chromatography on a silica column (eluent: CH2Cl2/EtOH: 25/1). Pale yellow solid.

Provenance & Evidence