ent-3α-Acetoxy-1α,11α-dibromo-2β-hydroxy-16-oxo-17,20-dinorgibberell-9-ene-7,19-dioic acid 7-(methyl ester) 19,2-lactone 在
锌 作用下,
以
四氢呋喃 为溶剂,
以94%的产率得到ent-3α-Acetoxy-10β-hydroxy-16-oxo-17,20-dinor-gibberella-1(10),9(11)-diene-7,19-dioic acid 7-(methyl ester) 19,2-lactone