In a 250 mL round bottom flask, triphenyl(3-propylhydroxy)stannane (5.46 g, 13.4 mmol) and p-toluenesulfonyl chloride (3.83 g, 20.1 mmol) were dissolved in DCM (100 mL). Once dissolved, NEt3 (3.73 mL, 26.8 mmol) was added, after which NMe3•HCl (1.28 g, 13.4 mmol) was added to the solution. The mixture was allowed to react at RT for 2 h. The organic layer was washed with five aliquots of distilled water (DW, 50 mL), and the volatile components were removed under reduced pressure. The resulting gel was triturated with MeOH (3 × 20 mL). The residual volatile components were removed under reduced pressure to yield the purified product as a white powder. Yield: 4.50 g, 60%. Mp = 76-77°C.