To a solution of the product of Example 149E (0.8 g, 1.56 mmol) dissolved in ethanol (20 mL) was cooled in an ice bath to 0° C., then bismuth(III) chloride (1.47 g, 4.67 mmol) was added followed by the portionwise addition of sodium borohydride (943 mg, 24.92 mmol) and warming the solution to room temperature for 20 minutes. The methanol was added and the solid removed by filtration, the filtrate concentrated to an oil, which was redissolved with dichloromethane and extracted with aqueous sodium bicarbonate. The organic solution was then dried, filtered, and concentrated to afford the title compound. m/z 484 (M+H)+.
