Photoadditions d'halogenures d'alkyle a 多种烯烃 enparticulier Br(CH 2 ) 3 Br avec CH 2 =CHCN en 存在 de CuX(X=Cl, Br), n-AmBr en 存在 de CuCl/P(n-Bu) 3,CH 2 Cl 2 存在于CuCl/P(Oet) 3 中。机制。Synthese de composes a liaison CC
Preparation of Tetrahydropyran Derivatives with α-Electron-Withdrawing Substituents from 1,5-Dibromopentane Derivatives by Treatment with Silver Nitrate
When 1,5-dibromopentane derivatives having the electron-withdrawing groups at one terminus, which were obtained by Cu(I)-catalyzed photochemical addition of 1,3-dibromopropanes to electron-deficient olefins, were subjected to treatment with silver nitrate, tetrahydropyranderivatives with the electron-withdrawing groups at the α-position to the oxygen atom were obtained.