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Into a 1 L round bottom flask equipped with a mechanical stirrer, thermometer and nitrogen purge was charged 3-triphenylmethylthio-2-(t-butoxycarbonylaminoethylthiomethyl)pyridine (40.0 g, 0.074 mol, 1 eq) followed by dichloromethane (200 mL). The light yellow solution was cooled to 0° C. and triethylsilane (60 mL) was added followed by dropwise addition of trifluoroacetic acid (200 mL) over approximately five minutes. The cold bath was removed and the solution was allowed to warm to room temperature (over 30 minutes) and was then allowed to stir at 20° C. for 30 minutes. The solvent was removed by rotary evaporation to give 27.75 g of the title compound as an orange waxy solid. 1H NMR (D2O) δ 2.88 (t, 2H); 3.28 (t, 3H); 4.18 (s, 2H); 7.45 (dd, 1H); 8.22 (d, 1H); 8.55 (d, 1H).

1. customInto a 1 L round bottom flask equipped with a mechanical stirrer
2. customthermometer and nitrogen purge
3. customThe cold bath was removed
4. temperatureto warm to room temperature (over 30 minutes)
5. customThe solvent was removed by rotary evaporation