Allenes undergo racemization in the presence of catalytic amounts of Pd(OAc)2/LiBr under mild conditions; the reaction proceeds via a bromopalladation–debromopalladation sequence and tolerates various functional groups.
在温和条件下,烯丙基体系在催化量的Pd(OAc)2/LiBr存在下发生外消旋化;反应通过
溴钯化-去
溴钯化序列进行,并且对各种官能团具有耐受性。