Reaction of 21-bromo-17.ALPHA.-methoxy-20-ketopregnenes with sodium methoxide or potassium acetate.
作者:MITSUTERU NUMAZAWA、MASAO NAGAOKA
DOI:10.1248/cpb.33.4589
日期:——
The reaction of 21-bromo-3β-hydroxy-17α-methoxypregn-5-en-20-one (5) with NaOCH3 in MeOH under reflux gave the 21-aldehyde 9 in modest yield along with the 21-hydroxy derivative 6. The 21-acetates 8 and 13 were obtained in good yields by prolonged reaction of the 21-bromides 5 and 11 with CH3COO-.