The treatment of Ti(OiPr)4 with 3-butenylmagnesium chloride generates titanacyclopentene complexes which effectively add to carbonyl compounds and nitriles to afford the 1,4-coupling products with high Z:E selectivities.
四异丙氧基钛与3-
丁烯基
氯化镁反应生成了
钛杂
环戊烯配合物,这些配合物能有效地加成到羰基化合物和腈类上,提供具有高Z:E选择性的1,4-偶联产物。