The generation of an electrophilic centre on the 11β-(2-hydroxyethyl) estradiol 3,17β-bis(benzyl ether)(2) leads in two steps to the corresponding 1,11β-ethano-estradiol in a 61% overall yield.
在11β-(2-羟乙基)
雌二醇3,17β-双(苄基醚)(2)上形成亲电子中心,可分两个步骤生成相应的1,11β-乙-
雌二醇,总产率为61%。