A Staudinger reaction between methoxyketene and two different imines formed from citral afforded, after chemical transformation, the (E/Z)-4-alkenylepoxy-2-azetidinones 2, 3 and 4. These compounds, by reaction with Cp₂TiCl, did not cyclize to afford the expected polycyclic β-lactams, but the corresponding allylic alcohols 12, 13 and 15 were obtained instead. Unexpectedly, the treatment of cyanoepoxide (E)-3 with Cp₂TiCl also gave the hydroxyl aldehyde (E)-14 whose formation suggests to us that a possible radical reduction of the cyano group might have occurred, and we lastly succeeded in the capture of the N-titanoimidoyl radicals. The behaviour observed for the isoprenoid side chain in the Staudinger reaction, the reactions with Cp₂TiCl, as well as the trapping of N-titanoimidoyl radicals generated from benzocyanoformyl-2-azetidinones with the Ti(III) reagent, are discussed.

methoxyketene和从柠檬醛，得到形成的两个不同的亚胺之间的施陶丁格反应，化学转化之后，（E / Z）-4- alkenylepoxy -2-氮杂环丁酮2，3和4。这些化合物中，再用Cp反应₂的TiCl，没有环化，得到期望的多环β内酰胺类，但相应的烯丙基醇12，13和15得到代替。出乎意料的是，用Cp ₂ TiCl处理氰基环氧化物（E）-3也会得到羟醛（E）-14它的形成向我们表明，氰基可能发生了自由基还原，我们最后成功地捕获了N-钛亚氨基酰亚胺基。讨论了在Staudinger反应，与Cp ₂ TiCl的反应中观察到的类异戊二烯侧链的行为，以及用Ti（III）试剂捕获苯并氰基甲酰基-2-氮杂环丁烷生成的N-钛亚氨基基团。