Radical Photocyclization Route for Macrocyclic Lactone Ring Expansion and Conversion to Macrocyclic Lactams and Ketones
作者:Keisuke Nishikawa、Yasuharu Yoshimi、Kousuke Maeda、Toshio Morita、Ichiro Takahashi、Tatsuya Itou、Sho Inagaki、Minoru Hatanaka
DOI:10.1021/jo3024126
日期:2013.1.18
two-carbon elongated macrocyclic lactones via decarboxylation. Similar photoreactions of carboxylic acid tethered acryl amide or α,β-unsaturated ketone moieties, which were also prepared starting from the macrocyclic lactones, produced macrocyclic lactams or ketones, respectively. The simple approach can be readily applied to the preparation of a variety of macrocyclic lactones, lactams, and ketones with
已经发现了一种新的合成大环内酯,内酰胺和酮的方法,该方法利用了含有束缚的羧酸和α,β-不饱和羰基部分的底物的光诱导的分子内自由基环化反应。由大环内酯开始制备的羧酸系链丙烯酸酯的光环化,通过脱羧作用得到了两个碳的长链大环内酯。羧酸束缚的丙烯酰胺或α,β-不饱和酮部分的类似光反应,也从大环内酯开始制备,分别产生大环内酰胺或酮。简单的方法可以很容易地应用于制备各种具有可调环大小的大环内酯,内酰胺和酮。