The present invention relates to novel pyrimidine acyclonucleoside derivatives represented by the following general formula (I), antiviral agents containing the derivatives as the active ingredients and processes of preparation thereof. ##STR1## wherein R.sup.1 is ethyl or isopropyl; R.sup.2 is (3,5 dimethylphenyl)selenenyl; R.sup.3 is phenyl or methyl; X is oxygen; and Y is oxygen.
Regioselective Synthesis of Selenide Ethers through a Decarboxylative Coupling Reaction
作者:Fei-Hu Cui、Jing Chen、Shi-Xia Su、Yan-li Xu、Heng-shan Wang、Ying-ming Pan
DOI:10.1002/adsc.201700676
日期:2017.11.23
An efficient and selective approach to the synthesis of selenide ethers containing one or two geminal C–Se bonds from readily available diselenides and phenylacetic acids was developed. Compounds containing one C–Se bond were prepared by employing air as the oxidant under metal-free conditions, whereas compounds having two geminal C–Se bonds were formed via the iron(III) chloride/oxygen/cesium carbonate
已开发出一种有效的,选择性的方法,可以从容易获得的二硒化物和苯乙酸合成含一个或两个双键C-Se键的硒醚。通过在无金属条件下将空气用作氧化剂来制备包含一个C-Se键的化合物,而通过氯化铁(III)/氧/碳酸铯(FeCl 3 / O 2)形成具有两个双键C-Se键的化合物。/ Cs 2 CO 3)系统。此外,在标准反应条件下,1,2-二苯基二硫烷也可以平稳地转化为相应的硫醚产物。
Direct Electrochemical Selenylation/Cyclization of Alkenes: Access to Functionalized Benzheterocycles
friendly, and efficient electrochemical selenylation/cyclization of alkenes has been developed with moderate to excellent yields. This selenylated transformation proceeds smoothly and tolerates a wide range of synthetically useful groups to deliver diverse functionalized benzheterocycles, including iminoisobenzofuran, lactones, oxindoles, and quinolinones. Moreover, the present syntheticroute could also
Preparation of selenyl 1,3-oxazines <i>via</i> PhICl<sub>2</sub>/Cu<sub>2</sub>O-promoted aminoselenation of <i>O</i>-homoallyl benzimidates with diselenides
作者:Linlin Zhang、Lin Qi、Jia-Min Chen、Wei Dong、Zhuo-Yue Fang、Tong-Yang Cao、Wei Li、Li-Jing Wang
DOI:10.1039/d1cc04854f
日期:——
benzimidate with diselenides promoted by PhICl2/Cu2O has been developed. The easily available and stable diselenides were used as selenium sources. Various selenyl 1,3-oxazines, which are important frameworks in medicinal and biological chemistry, were easily obtained in moderate to good yields for the first time. Easy scaleup and scalability make this method attractive for the preparation of other valuable
Silver-Catalyzed Remote C5–H Selenylation of Indoles
作者:Wei-Hong Song、Jia Shi、Xiaohong Chen、Guoyong Song
DOI:10.1021/acs.joc.0c00921
日期:2020.9.4
functionalization at C5 is the most sparingly observed selectivity in the functionalization of indole templates. Herein, we reported that the combination of a AgSbF6 catalyst and phenyliodine diacetate oxidation enabled the C–H selenylation at the C5 position of indole scaffolds in a selective version, thus leading to the formation of a wide scope of 5-selenylated indole derivatives, which are otherwise difficult