作者:Raúl SanMartín、Eduardo Martínez de Marigorta、Esther Domínguez
DOI:10.1016/s0040-4020(01)85083-3
日期:1994.2
the system Al2O3/R2NH to give β-aminoketones. The latter tandem amination system has also been applied in the Mannichreaction, improving the synthesis of several new diaryl β-aminoketones. Besides, the sequential use of DMFDMA and LAH-CuI on deoxybenzoins furnishes a newroute for the synthesis of enones.
制备了烯胺酮并使其与LAH和Al 2 O 3 / R 2 NH体系共轭还原,得到β-氨基酮。后者的串联胺化系统也已用于曼尼希反应中,从而改善了几种新的二芳基β-氨基酮的合成。此外,DMFDMA和LAH-CuI在脱氧安息香素上的顺序使用为烯酮的合成提供了一条新途径。
Enantioselective Synthesis of Isoflavanones and Pterocarpans through a Ru
<sup>II</sup>
‐Catalyzed ATH‐DKR of Isoflavones
作者:Francisco V. Gaspar、Guilherme S. Caleffi、Paulo C. T. Costa‐Júnior、Paulo R. R. Costa
DOI:10.1002/cctc.202101252
日期:2021.12.15
(R,R)-RuII-catalysts promoted the one-pot C=C/C=O bonds reduction of isoflavones through ATH-DKR. Ten cis-3-phenylchroman-4-ols were selectively obtained (>20 : 1 dr) in good yields (up to 86 %) and excellent er (up to >99 : 1). Due to the neutral conditions employed, isoflavones with different substituents at the 2’-position of B-ring (H, OH, OMe and Br) were successfully reduced. Synthetic applications
( R , R )-Ru II -催化剂通过 ATH-DKR 促进异黄酮的一锅 C=C/C=O 键还原。以良好的产率(高达 86%)和优异的 er(高达 >99:1)选择性地获得了10 种顺式-3-苯基色满-4-醇(>20:1 dr)。由于采用中性条件,在 B 环(H、OH、OMe 和 Br)的 2' 位具有不同取代基的异黄酮被成功还原。还展示了这些手性产品的合成应用。
Synthesis, crystal structure determination and pharmacological activity of 7,8,3′,4′-tetramethoxyisoflavone
7 The8,3′,4′-tetramethoxyisoflavone 2 was synthesized and its structure confirmed by X-ray crystallographic analysis. Pharmacological screening was carried out with this compound in order to assess its pharmacological profile. Isoflavone 2 possessed antiinflamatory activity in the carrageenan oedema test, with a dose-effect relationship comparable to that of hydroxylated flavonoids. It is noteworthy