of stereoisomers depends strongly on the base employed. Condensation with acetaldehyde or benzaldehyde leads to four stereoisomeric products 11C–F and 12C–F, proportion of which depends also on the bases used. Decomplexation leads in the case of alkylated products to bromides 13, and in the case of aldol product 11 to bromohydrin 14 and epoxides 15 and 16.
阴离子4的烷基化几乎没有立体选择性,并导致立体异构产物5A,B–9A,B的混合物。立体异构体的比例在很大程度上取决于所用的碱。与
乙醛或
苯甲醛缩合会生成4种立体异构产物11C-F和12C-F,其比例还取决于所用的碱。在烷基化产物对
溴化物的情况下解络引线13,和在醇醛产物的情况下,11到
溴代醇14和
环氧化物15和16。