First Lewis acid catalyzed [4+2] cycloaddition reaction of 1,3,3-trimethyl-2-vinyl-1-cyclohexene with chromones: a new entry to analogues of the puupehenone group of marine diterpenoids and kampanols
作者:Rajesh M. Kamble、M. M. V. Ramana
DOI:10.1007/s00706-011-0480-z
日期:2011.5
AbstractA rapid assembly of the tetracycliccore of marinediterpenoidsrelated to puupehenone and kampanols featuring a Lewis acid catalyzed [4+2] cycloaddition reaction of 1,3,3-trimethyl-2-vinyl-1-cyclohexene and chromone dienophiles is described. Graphical abstract
Diels-Alder Reaction of 2-Ethenyl-1,3,3-trimethylcyclohexene with 4H-Chromen-4-ones: A Convergent Approach to ABCD Tetracyclic Core of Marine Diterpenoids Related to Puupehenone and Kampanols
作者:Rajesh M. Kamble、M. M. V. Ramana
DOI:10.1002/hlca.201000188
日期:2011.2
A rapid assembly of the tetracycliccore of marinediterpenoidsrelated to puupehenone and kampanols by DielsAlder reaction of 2‐ethenyl‐1,3,3‐trimethylcyclohexene with 4H‐chromen‐4‐one (=4H‐1‐benzopyran‐4‐one) dienophiles is described.
Microwave-assisted Diels–Alder reaction of 1,3,3-trimethyl-2-vinyl-1-cyclohexene with chromones — An expeditious approach to analogues of the puupehenone group of marine diterpenoids and kampanols
作者:Rajesh M. Kamble、M. M.V. Ramana
DOI:10.1139/v10-137
日期:2010.12
A rapid assembly of the tetracycliccore of marinediterpenoidsrelated to puupehenone and kampanols by a Diels–Alderreaction of 1,3,3-trimethyl-2-vinyl-1-cyclohexene with chromones under microwav...
Synthesis of 6-(2-hydroxyaryl)-2-pyridones by the reaction of chromones with cyanoacetic, acetoacetic, and malonic acid amides
作者:A. V. Safrygin、V. A. Anufriev、V. Ya. Sosnovskikh
DOI:10.1007/s11172-013-0181-3
日期:2013.5
A reaction of chromones with cyanoacetic, acetoacetic, and malonic acid amides in the presence of sodium ethoxide furnished a number of new 3-substituted 6-(2-hydroxyaryl)-2-pyridones in good yields, including those containing a polyfluoroalkyl group at position 4.
Tandem Reactions Leading to Bicyclic Pyrimidine Nucleosides and Benzopyran-4-ones
作者:Xuesen Fan、Yangyang Wang,、Yingying Qu、Haiyun Xu、Yan He、Xinying Zhang、Jianji Wang
DOI:10.1021/jo102131y
日期:2011.2.4
and efficient synthesis of bicyclic pyrimidine nucleosides and benzopyran-4-ones through oxidation of homopropargyl alcohols and subsequent isomerization, intramolecular addition of enol to allenic ketone has been developed. This methodology provides an efficient and promising approach to the structurally and pharmaceutically interesting pyrano[2,3-d]pyrimidine-2,5-dione nucleoside and benzopyran-4-one
已经开发了通过高炔丙醇的氧化和随后的异构化,将烯醇分子内加成到烯丙基酮中的新颖,快速,有效的双环嘧啶核苷和苯并吡喃-4-酮的合成方法。这种方法为结构和药学上有趣的吡喃并[2,3 - d ]嘧啶-2,5-二酮核苷和苯并吡喃-4-酮衍生物提供了有效而有前途的方法。