Trifluoroacetic acid → HCID 19900649, compound

Participants

Reaction Steps

3.6 ml (46 mmol) of trifluoroacetic acid is added to a solution of 1.56 g (4.64 mmol) of tert-butyl 2-[3,5-di(tert-butyl)-4-hydroxyphenoxy]acetate (prepared according to J. Heterocycl. Chem. (1994) 31, 1439-1443) in 20 ml of dichloromethane. The reaction mixture is agitated for 1 hour, concentrated under vacuum and the residue is dissolved in 50 ml of Et2O. The organic solution is extracted twice with 25 ml of a saturated solution of NaHCO3, the aqueous phase is then washed with 25 ml of Et2O. The basic aqueous solution is then acidified, at 0° C., with a saturated solution of KHSO4 and finally the expected product is extracted using twice 25 ml of Et2O. The organic solution is dried over sodium sulphate, filtered and concentrated under vacuum in order to produce a white powder with a yield of 70%. Melting point: 172-173° C.

Provenance & Evidence