Under carefully chosen working conditions (solvent, temperature), methyltitanium reagents smoothly convert homoallyl alcohols having a terminal double-bond into (E)-3-penten-l-ols whereas non-terminal 3-alken-l-ols afford 4-methyl-branched derivatives with configurational inversion of the chain (Z → E; E → Z), stereoselectivities being better than 99%.
在精心选择的工作条件(溶剂,温度)下,甲基
钛试剂可将具有末端双键的均烯丙基醇平稳地转化为(E)-
3-戊烯-1-醇,而非末端的3-烯丙基-1-醇可提供4-甲基-链支链的衍
生物,具有链的构型反转(Z→E; E→Z),立体选择性优于99%。