钌钳络合物RuCl(CNNPh)(二膦)催化的黄烷酮和邻羟基查尔酮的转移氢化反应在温和的反应条件下和较短的反应时间下以80-88%的产率合成了邻羟基1,3-二丙醇( 1 h)在2-丙醇中的溶液。已发现助催化剂NaO i Pr的量对于将黄烷酮选择性还原为邻羟基1,3-二丙醇与黄烷-4-醇至关重要。初步结果表明,使用带有(S,R)-Josiphos的钳式催化剂,黄烷酮以中等转化率(36%)和高达92%ee还原为相应的(S)-醇。
Convenient and Highly Efficient Routes to 2
<i>H</i>
‐Chromene and 4‐Chromanone Derivatives: Iodine‐Promoted and
<i>p</i>
‐Toluenesulfonic Acid Catalyzed Cascade Cyclizations of Propynols
A convenient strategy is presented for the easy preparation of a series of 2H‐chromenes under mild conditions through iodocyclization of readily accessible propynols. In addition, various 4‐chromanones can be synthesized through a p‐toluenesulfonicacidcatalyzedcascadecyclization with high efficiency (yields up to 99 %). Our developed reaction systems are proven to have good functional‐group applicability
pH-Dependent conjugate addition of arylboronic acids to α,β-unsaturated enones catalyzed by a reusable palladium(II)/cationic 2,2′-bipyridyl system in water under air
作者:Shao-Hsien Huang、Tzu-Min Wu、Fu-Yu Tsai
DOI:10.1002/aoc.1654
日期:2010.9
A reusable Pd(NH3)2Cl2/cationic 2,2′‐bipyridyl system for the catalysis of the conjugateaddition of arylboronic acids to α,β‐unsaturated enones in water under air was developed. Addition of arylboronic acids to both cyclic and acyclic enones progressed smoothly, providing the products in good to high yields, the best result being obtained when HBF4 was used to adjust the pH value to 1.0. After the
Iodine catalyzed one-pot synthesis of flavanone and tetrahydropyrimidine derivatives via Mannich type reaction
作者:Veerababurao Kavala、Chunchi Lin、Chun-Wei Kuo、Hulin Fang、Ching-Fa Yao
DOI:10.1016/j.tet.2011.11.022
日期:2012.1
A variety of functionalized flavanone derivatives and tetrahydropyrimidine derivatives were achieved under remarkably mild conditions. The combination of good to excellent yields, a simple work-up, and the high compatibility of functional groups makes this an attractive synthetic approach to access flavanone and tetrahydropyrimidine derivatives.
An efficient synthesis of flavanones and their docking studies with aldose reductase
作者:D. D. Kondhare、G. Gyananath、Yasinalli Tamboli、Santosh S. Kumbhar、Prafulla B. Choudhari、Manish S. Bhatia、P. K. Zubaidha
DOI:10.1007/s00044-017-1813-1
日期:2017.5
supported by the docking studies. Among the tested derivatives, 2, 3, 4-methoxy derivative 19 (IC50 5.88 ± 0.03 µM) exhibited the highest inhibitory activity whereas 2-methoxy derivative 12 showed the lowest, and the remaining compounds exhibited moderate activity with IC50 in the range of 6.09–7.89 µM. The spatial configuration of the most active derivative 19 was compared with pharmacophore requirements
flavanones, which included polycyclic aromatic and heterocyclic rings, were readily synthesized via oxa-Michael addition from the corresponding hydroxychalcones with a catalytic amount of aqueous cesium fluoride solution under mild conditions. This method could be applied to the scalable synthesis of eriodictyol as a known potent inhibitor of the SARS-CoV-2 spike protein.