Reaction of Selenoamide Dianions with Thio- and Selenoformamides Leading to the Formation of 5-Aminoselenazoles: Photophysical and Electrochemical Properties
作者:Toshiaki Murai、Kirara Yamaguchi、Fumihiko Hori、Toshifumi Maruyama
DOI:10.1021/jo500499g
日期:2014.6.6
5-Amino-2-selenazolines were synthesized by reacting selenoamide dianions generated from secondary selenoamides and BuLi with tertiary thio- and selenoformamides followed by treatment with iodine. The resulting 5-amino-2-selenazolines were further oxidized with iodine to give 5-aminoselenazoles in moderate to good yields. The general tendencies in the 77Se NMR spectra of the starting selenoamides,
通过使由仲硒酰胺和BuLi生成的硒酰胺二价阴离子与叔硫代和硒甲酰胺反应,然后用碘处理,可以合成5-氨基-2-硒代唑啉。将所得的5-氨基-2-硒代唑啉进一步用碘氧化,以中等至良好的产率得到5-氨基硒代唑。77大趋势测定了起始硒酰胺,5-氨基-2-硒代唑啉和5-氨基硒唑的Se NMR谱。这些化合物的化学位移受到涉及硒原子的骨架以及每个骨架碳原子上的取代基的高度影响。通过X射线分析明确了5-氨基硒唑的分子结构,并通过DFT计算阐明了它们的电子结构。最后,对5-氨基硒代唑进行了紫外-可见光谱和荧光光谱法以及循环伏安法(CV),并讨论了它们与硒代唑环上取代基的性质。