自由基离子裂解促进的光诱导电子转移反应

Mesolytic cleavage, i.e., the facilitated bond cleavage in radical cations and radical anions, was used as a strategy to develop new methods applicable to organic synthesis. This methodology can prevent the back electron transfer in photoinduced electron transfer reactions, hence significantly promote such reactions. New reactions found in this program include: (a) photoinduced regioselective free radical addition to aromatic imines；（b）photoinduced Dielse-Alder reactions of aromatic imines for synthesis of tetrahydroquinoline derivatives；（c）Photoinduced radical cation mediated selective ring opening reaction of epoxides；（d）Formation of novel macrocyclic crown ethers by photoinduced reaction of diazonaphthaquinones；（e）photoinduced selective desilylation of silyl ethers.

发展和完善通过自由基离子裂解阻止电子回传，从而促进光诱导电子转移反映的新方法。并利用时间分辨化学诱导动态核极化（TRIDNP）及时间分辨电子自旋共振（TRESR）对发应进邢晗傅亩Ш突硌芯俊１痉椒ú坏梢蕴岣哂盏嫉缱幼品从Φ墓饬孔硬剩箍赡艿玫叫碌墓饣Р铮佣儆谢б桓鲂铝煊颉?.