Pr2CO], in THF, at temperatures ranging from −78 to 0°C, gave, after hydrolysis, products 2 resulting from addition of lithium to the olefinic double bond and successive trapping with the electrophilic reagent. When a carbonyl compound was used as electrophile, mixtures of the monoaddition–reduction compounds 3 and 4 were obtained as by-products, which could be easily separated from the diaddition
苯乙烯和一些甲基取代的
苯乙烯1与
锂和催化量的4,4'-二叔丁基
联苯(DTBB)在几种亲电试剂[Me 3 SiCl,Me 2 CO,Et 2 CO, (CH 2)5 CO,Pr 2 CO]在THF中,于-78至0°C的温度范围内,
水解后得到由
锂加成至烯烃双键并随后用亲电子试剂捕获而得到的产物2。当羰基化合物用作亲电试剂时,单加成还原化合物3和4的混合物获得的副产物可以容易地与二价产物2分离。