HCID 11349373, compound → HCID 11484086, compound

Participants

Reaction Steps

A suspension of 22.13 g of 10-tert-butoxy-1,1,1 -trifluoro-6,6-dimethyl-2-trifluoromethyl-dec-3-yn-2-ol, 220 ml of tert-butylmethyl ether and 3.32 g of Lindlar catalyst was hydrogenated at 22° and 1 bar for 1.5 h after which time hydrogen up-take ceased. The suspension was filtered, the filtrate evaporated and the residue, containing pure (Z)-10-tert-butoxy-1,1,1-trifluoro-6,6-dimethyl-2-trifluoromethyl-dec-3-en-2-ol, was dissolved in 44 ml of isopropanol. The solution was treated with 22.8 g of 50% aqueous H2SO4 and the mixture was heated to 90° for 2 h after which time g.l.c. indicated completion of the reaction. The mixture was evaporated, the residue partitioned between dichloromethane and saturated NaHCO3 solution and the aqueous layer was extracted several times with dichloromethane. The combined organic layers were dried over MgSO4 and evaporated to give 17.97 g of the pure title compound as a colorless oil.

Provenance & Evidence