Synthesis of non-racemic dihydrofurans via Ni(II)-catalyzed asymmetric Michael addition
作者:Dmitry S. Nikerov、Maria A. Ashatkina、Vadim A. Shiryaev、Ilya M. Tkachenko、Victor B. Rybakov、Alexander N. Reznikov、Yuri N. Klimochkin
DOI:10.1016/j.tet.2021.132029
日期:2021.3
A highly efficient strategy for the enantio- and diastereoselective synthesis of 4,5-dihydrofuran derivatives was developed. Addition of carbonyl compounds which contain bulky adamantyl substituent and β-keto or phosphonate group to conjugated α-bromonitroolefins in the presence of a chiral Ni(II) complex gave corresponding non-racemic products of Michael reaction. These adducts were used for intramolecular
Preparation of a microsized cerium chloride-based catalyst and its application in the Michael addition of β-diketones to vinyl ketones
作者:Alexander O. Terent'ev、Vera A. Vil'、Ivan A. Yaremenko、Oleg V. Bityukov、Dmitri O. Levitsky、Vladimir V. Chernyshev、Gennady I. Nikishin、Fabrice Fleury
DOI:10.1039/c3nj01454a
日期:——
evaporation of its alcoholic solutions. The way of the preparation of the cerium chloride-based catalyst plays a decisive role in its catalytic activity. This catalyst is efficient in the Michaeladdition of β-diketones to vinyl ketones giving β,δ-triketones.
Ion exchange resin-catalyzed synthesis of bridged tetraoxanes possessing in vitro cytotoxicity against HeLa cancer cells
作者:Vera A. Vil’、Ivan A. Yaremenko、Dmitri I. Fomenkov、Dmitri O. Levitsky、Fabrice Fleury、Alexander O. Terent’ev
DOI:10.1007/s10593-020-02722-4
日期:2020.6
Bridged 1,2,4,5-tetraoxanes were prepared using available acidic ion exchange resin with high yields despite the possibility of peroxide decomposition under heterogeneous conditions. The bridged tetraoxanes demonstrated high cytotoxicity against HeLa cancer cells in vitro, which in some cases was higher than that of cisplatin, artesunate, and dihydroartemisinin.
利用现有的酸性离子交换树脂制备了桥接的 1,2,4,5-四氧杂环己烷,尽管在异构条件下可能会发生过氧化物分解,但产量很高。桥接四氧杂环己烷在体外对 HeLa 癌细胞具有很强的细胞毒性,在某些情况下,其毒性高于顺铂、青蒿琥酯和双氢青蒿素。
Synthesis of Adamantylated Pyrimidines Using the Biginelli Reaction
low yields. An adamantylated 2-thioxo-1,2,3,4-tetrahydropyrimidine is used to prepare thiazolo[3,2-a]pyrimidine derivatives. Using an adamantane 3-oxonitrile and adamantane 1,3-dicarbonyl compounds in the three-component Biginelli reaction promoted by trimethylsilyl chloride, adamantylated pyrimidines are prepared. The reaction with the oxonitrile leads to 6-(1-adamantyl)-2-thioxo-1,2,3,4-tetrahyd
摘要 在由三甲基甲硅烷基氯促进的三组分Biginelli反应中使用金刚烷3-氧腈和金刚烷1,3-二羰基化合物,制备了金刚烷基化的嘧啶。根据芳族醛的类型,与氧腈的反应产生6-(1-金刚烷基)-2-硫氧代-1,2,3,4-四氢嘧啶-5-腈和/或2-亚苄基-3-氧腈。1,3-二羰基金刚烷化合物以低收率得到1-金刚烷基(2-硫氧杂-1,2,3,4-四氢嘧啶-5-基)亚甲基。将金刚烷化的2-硫代-1,2,3,4-四氢嘧啶用于制备噻唑并[3,2- a ]嘧啶衍生物。 在由三甲基甲硅烷基氯促进的三组分Biginelli反应中使用金刚烷3-氧腈和金刚烷1,3-二羰基化合物,制备了金刚烷基化的嘧啶。根据芳族醛的类型,与氧腈的反应产生6-(1-金刚烷基)-2-硫氧代-1,2,3,4-四氢嘧啶-5-腈和/或2-亚苄基-3-氧腈。1,3-二羰基金刚烷化合物以低收率得到1-金刚烷基(2-硫氧杂-1,2,3,4-四氢
Synthesis of pyrazoles and pyrazolones from 1,3- and 1,4-diketones of the adamantane series
作者:S. A. Kon’kov、I. K. Moiseev
DOI:10.1134/s1070428009120124
日期:2009.12
Various pyrazole and dihydropyrazolones containing an adamantane fragment were synthesized from adamantyl-substituted 1,3- and 1,4-diketones, ethyl 4-(1-adamantyl)-2-R-4-oxobutanoates (R = CN, Ac), and ethyl 2-(1-adamantylcarbonyl)-4-oxo-4-phenylbutanoate.