Asymmetric ring transformation of meso-7-(2-oxoalkyl)bicyclo[3.3.0]octan-3-ones into chiral bicyclo[3.2.1]oct-2-ene derivatives is accomplished by treatment with chiral cyclic (six- or seven-membered ring) 1,2-diols–BF3–Et2O.
通过用手性环状环(六或七个)处理,可将内消旋-7-(2-氧代烷基)双环[3.3.0] octan-3-ones不对称环转化为手性双环[3.2.1] oct-2-ene衍
生物。元环)1,2
-二醇-BF 3 -Et 2 O.