“…To a solution of (30.0 mg, 0.114 mmol) in toluene (4.56 mL, 0.025 M) was added catalyst 14 (9.68 mg, 0.0114 mmol), and the resulting solution was heated to 80 °C for 1 h. The mixture was then concentrated, leaving a residue which was purified by silica-gel column chromatography to afford 34 (22.9 mg, 0.0977 mmol, 86%) as a brown oil. IR (film) ν 3399, 2924, 1443, 1064 cm -1 ; 1 H-NMR (400 MHz, CDCl 3 ) δ 5.83 (1H, m), 5.64 (1H, m), 3 S43 and S44. The structure of 34 was unambiguously determined by X-ray analysis of crystalline p-bromobenzoate ester 52.…”