Thallium(
<scp>III</scp>
)
<i>p</i>
‐tosylate‐mediated oxidative [1,2] rearrangement of
<scp>2‐naphthyl</scp>
and
<scp>2‐heteroarylchromanones</scp>
作者:Chidvilas Kurapati、Murugan Muthukrishnan、Om V. Singh、Rambabu Gundla
DOI:10.1002/jhet.4377
日期:2022.1
A practical and effective approach towards the synthesis of 3-heteroaryl-4H-chromen-4-ones by the oxidative [1,2] rearrangement of the respective 2-heteroaryl chroman-4-ones using thallium(III) p-tosylate is presented. The oxidative rearrangement of α- and β-naphthyl and thiophene substituents behaves like aryl groups; However, pyridyl substituents gave only dehydrogenated products.
通过使用对甲苯磺酸铊 (III)对各自的 2-杂芳基 chroman-4-ones 进行氧化 [1,2] 重排来合成 3-heteroaryl-4 H -chromen-4-ones的实用且有效的方法是提出了。α-和β-萘基和噻吩取代基的氧化重排表现得像芳基;然而,吡啶基取代基仅产生脱氢产物。
Synthesis and Antimicrobial Activity of 2-(Pyridine-3-yl)-4<i>H</i>-chromen-4-one Derivatives
作者:Asha V. Chate、Dattatraya S. Ghotekar、Sunil S. Bhagat、Charansingh H. Gill
DOI:10.1002/jhet.955
日期:2013.1
An efficiently synthesis of chromones via cyclodehydration of corresponding 1‐(2‐hydroxyphenyl)‐3‐(pyridine‐3‐yl)propane‐1,3‐dione is described under ultrasound irradiation. A series of novel 2‐(pyridine‐3‐yl)‐4H‐chromen‐4‐one derivatives was confirmed on the basis of 1H‐NMR, mass, IR spectral data, and elemental analysis. The synthesized compounds were evaluated for their antibacterial and antifungal