反应详情

To a mixture of 21A (0.047 g, 0.1 mmol), triphenylphosphine (79 mg, 0.3 mmol), and 4-hydroxymethylpyridine (22 mg, 0.2 mmol) in dry THF was added diethyl azodicarboxylate (0.047 ml, 0.3 mmol). The mixture was stirred at room temperature overnight and purified by preparative HPLC to give Compound 21B as a colorless semi-solid (TFA salt). Analytical HPLC retention time=2.303 min. (Chromolith Speed ROD column 4.6×50 mm, 10–90% aqueous methanol over 4 minutes containing 0.2% trifluoroacetic acid, 4 mL/min, monitoring at 254 nm) and a LC/MS M++1=564+.

1. custompurified by preparative HPLC