Reaction #56612

Reaction equation

trimethylsilyl chloride

4-oxo-4-[4′-(trifluoromethoxy)-1,1′-biphenyl-4-yl]butyric acid

2,2-dimethoxypropane

→

Methyl-4-oxo-4-[4′-(trifluoromethoxy)-1,1′-biphenyl-4-yl]butanoate

Solvents

methanol

Conditions

Workup

1. 1
   ConcentrationThe reaction mixture is then concentrated
2. 2
   Otherthe residue is recrystallized from toluene

Procedure

Crude 4-oxo-4-[4′-(trifluoromethoxy)-1,1′-biphenyl-4-yl]butyric acid (25 g, content: 65%, GC, silylated, 100% method) is dissolved in a mixture of methanol (50 ml) and 2,2-dimethoxypropane (11.5 g, 110 mmol), treated with trimethylsilyl chloride (0.75 g, 7 mmol) and stirred at 50° C. for 16 h. The reaction mixture is then concentrated and the residue is recrystallized from toluene.

Source