反应详情

Compound 21C (31 mg) was prepared from 21B by a route analogous to that used for the preparation of 1G as a white solid. Analytical HPLC retention time=1.480 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=464+.