易于制备的锡烷1在标准的自由基反应中的行为与常规试剂Bu3SnH和Ph3SnH相似,但具有的特殊特征是,通过温和水解(LiOH-水-THF)可轻松且大量去除含锡副产物或TsOH-水-THF),将其转化为碱溶性(NaHCO3水溶液)。在一系列涉及卤化物,硒化物,Barton-McCombie脱氧和烯炔环化的自由基反应中,评估了锡烷1的性能。在一些情况下,通过1 H NMR监测后处理程序在去除锡中的有效性。
Amide-based protecting/radical translocating (PRT) groups. Generation of radicals adjacent to carbonyls by 1,5-hydrogen transfer reactions of o-iodoanilides
作者:Dennis P. Curran、Hosung Yu、Hongtao Liu
DOI:10.1016/s0040-4020(01)90466-1
日期:——
The o-iodoanilide group is shown to be broadly useful for the generation and subsequent reactions of radicals adjacent to carboxyl groups. The results indicate that this group is one of the best ''protecting/radical translocating'' (PRT) groups introduced to date. Beyond its good performance in radical translocation reactions, it is easy to introduce, serves as a reasonable protecting group both before and after the translocation, and (with appropriate modifications) is easy to remove.
Unique Ionic Iodine Atom Transfer Cyclization: A New Route to Iodomethylated Pyrrolidine Derivatives from γ-Iodoolefin and Chloramine-T
[GRAPHIC]Pyrrolidines and bicyclic pyrrolidine derivatives can effectively be synthesized from gamma-iodoolefins using commercially available chloramine-T (CT) as a nitrogen source. The cyclization proceeds with high stereoselectivity via a cyclic iodonium intermediate.
Synthesis of 2-Azatricyclo[5.2.1.0<sup>4,10</sup>]decanes and 2,5-Diazatricyclo[5.2.1.0<sup>4,10</sup>]decanes by Intramolecular Azomethine Ylide Cycloadditions
作者:Larry E. Overman、John E. Tellew
DOI:10.1021/jo961341r
日期:1996.11.15
Cascade Radical Reactions Catalyzed by a Pd/Light System: Cyclizative Multiple Carbonylation of 4-Alkenyl Iodides
Cascade reactions of 4-alkenyl iodides, involving a carbonylation-cyclization-carbonylation sequence, were accomplished by a hnu/Pd system. The stereochemical outcomes suggest that radical carbonylation and subsequent acyl radical cyclization may be involved in this reaction.