A Facile Synthesis of Ethyl-2-Methyl-5h-Chromeno[3,4-c]Pyridine-1-Carboxylates
摘要:
4-Chloro-2H-3-chromene carbaldehydes (2a-i) on reaction with ethyl-3-aminocrotonate 3 gives ethyl-2-methyl-5H-chromeno[3,4-c]pyridine-1-carboxylates 4a-i in good yields.
Synthesis and in Silico Study of Novel Benzisoxazole‐Chromene Derivatives as Potent Inhibitors of Acetylcholinesterase: Metal‐Free Site‐Selective C−N Bond Formation <i>via</i> Aza‐Michael Reaction
作者:Grace Victoria Govada、Sabbasani Rajasekhara Reddy
DOI:10.1002/cbdv.202300573
日期:2023.8
An efficient metal-free approach for site selective C−N coupling reaction of benzo[d]isoxazole and 2H-chromene derivatives has been designed and developed against AchE. This nitrogen containing organo-base promoted methodology, which is both practical and environmentally friendly, provides an easy and suitable pathway for synthesizing Benzisoxazole-Chromene (BC) possessing poly heteroaryl moieties
针对 AchE,设计并开发了一种有效的无金属方法,用于苯并[d]异恶唑和 2 H-色烯衍生物的位点选择性 CN 偶联反应。这种含氮有机碱促进的方法既实用又环保,为合成具有多杂芳基部分的苯并异恶唑-色烯(BC)提供了一种简单且合适的途径。将合成的 BC 衍生物4 a – n对接至 AChE 的活性位点,以获得对化合物结合模式的更多了解。其中,化合物4a和4l对 AChE 抑制表现出有效的活性和高选择性。最终对接结果表明,化合物4l与AChE的结合能最低,为-11.2260 kcal/mol。合成的BC类似物将成为促进药物化学研究中适当研究的潜在候选者。
Halogen-Exchange Fluorination of β-Chlorovinyl Aldehydes - Unexpected Cascade Transformations in the Fluorination of 4-Chloro-2<i>H</i>
-chromene and 4-Chloro-2<i>H</i>
-thiochromene-3-carbaldehydes
One of the most facile and robust ways of incorporating fluorine atoms in organic substrates is through the Halex fluorination. We have described here the Halex fluorination of β‐chlorovinyl aldehydes using KF/DMSO system under mild conditions. Further the transformation of the fluoro‐substituted intermediates to its dimeric compounds via a cascade sequence of six steps is discussed.
A Facile Synthesis of Ethyl-2-Methyl-5h-Chromeno[3,4-c]Pyridine-1-Carboxylates
作者:S. Ramadas、G. L. David Krupadanam
DOI:10.1080/00397910008087128
日期:2000.3
4-Chloro-2H-3-chromene carbaldehydes (2a-i) on reaction with ethyl-3-aminocrotonate 3 gives ethyl-2-methyl-5H-chromeno[3,4-c]pyridine-1-carboxylates 4a-i in good yields.