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2.46 mmol of 6-[(triphenylmethyl)thio]-1,3-hexanedicarboxylic acid (IV) (1.1 g) with 5 mmol triisopropylsilane (0.79 g) was dissolved in a mixture of 3 ml CH2Cl2/3 ml trifluoroacetic acid and left to stand at room temperature for 1 hour. The mixture was then evaporated to dryness and washed 3× with hexane. The remaining oily residue was dissolved in water, filtered and lyophilized to yield 0.35 g of 2-(3-sulfanylpropyl) pentanedioic acid (V) (76%), 13C-NMR (MeOH) δ 25.2(t), 28.8(t), 32.4(t), 33.0(t), 33.2(t), 45.9(d), 177.2(s), 179.6(s).

1. waitleft
2. customThe mixture was then evaporated to dryness
3. washwashed 3× with hexane
4. dissolutionThe remaining oily residue was dissolved in water
5. filtrationfiltered