652968-72-4Relevant academic research and scientific papers
Synthesis of Benzoaryl-5-yl(2-hydroxyphenyl)methanones via Photoinduced Rearrangement of (E)-3-Arylvinyl-4H-chromen-4-ones
Fan, Jinming,Wang, Tao,Li, Chenchen,Wang, Rui,Lei, Xiaoyu,Liang, Yong,Zhang, Zunting
supporting information, p. 5984 - 5987 (2017/11/10)
A concise and efficient photoinduced rearrangement of (E)-3-arylvinyl-4H-chromen-4-ones for the synthesis of benzoaryl-5-yl(2-hydroxyphenyl)methanones is described. Benzoaryl-5-yl-(2-hydroxyphenyl)methanones were obtained in 77-95% yields via the irradiation of (E)-3-arylvinyl-chromones in the 95% EtOH with a high-pressure mercury lamp at room temperature under Ar atmosphere. The reported method provides a novel procedure for the synthesis of α,α′-diaryl ketone derivatives without addition of any transition metals and oxidants or other additives. A plausible mechanism was proposed, and the rearrangement product was characterized by NMR, HRMS, and X-ray.
Direct construction of xanthene and benzophenone derivatives via Br?nsted acid controlled Diels-Alder reaction of 3-vinylchromones and arynes
Huang, Xu-Jiao,Tao, Yuan,Li, Yue-Kun,Wu, Xin-Yan,Sha, Feng
, p. 8565 - 8577 (2016/12/09)
A Br?nsted acid controlled Diels-Alder reaction of 3-vinylchromones with arynes has been developed. By employing different kinds and amounts of acid, 9-aryl-9H-xanthen-9-ols or ortho-hydroxybenzophenones could be controllably furnished in good yields in an atom- and step-economic manner.
Electron-deficient dienes. 5. An inverse-electron-demand Diels-Alder approach to 2-substituted 4-methoxyxanthones and 3,4-dimethoxyxanthones
Dang, Anh-Thu,Miller, David O.,Dawe, Louise N.,Bodwell, Graham J.
, p. 233 - 236 (2008/09/18)
(Chemical Equation Presented) Several 4-methoxyxanthones and 3,4-dimethoxyxanthones were synthesized in good yield via inverse-electron- demand Diels-Alder (IEDDA) driven domino reactions between a series of electron-deficient chromone-fused dienes with 1-(2,2-dimethoxyvinyl)pyrrolidine or tetramethoxyethene, respectively.
Synthesis of 3-[2-(4-nitrophenyl)vinyl]-chromon-4-one by ultrasonic irradiation
Dalvi,Karale,Gill
, p. 1522 - 1523 (2007/10/03)
Various 3-[2-(4-nitrophenyl)vinyl]chromon-4-ones have been synthesized by ultrasonic activation from corresponding 3-formylchromones and 4-nitrophenylacetic acid.
Condensation of chromone-3-carboxaldehyde with phenylacetic acids: An efficient synthesis of (E)-3-styrylchromones
Silva, Vera L. M.,Silva, Artur M. S.,Pinto, Diana C. G. A.,Cavaleiro, José A. S.,Patonay, Tamás
, p. 2717 - 2720 (2007/10/03)
An efficient and diastereoselective synthetic method for preparing (E)-3-styrylchromones has been developed by the reaction of chromone-3- carboxaldehyde with phenylacetic acids in the presence of potassium tert-butoxide under classical heating conditions or microwave irradiation. The Knoevenagel-type reaction followed by a decarboxylation was faster under microwave conditions.
Wittig reactions of chromone-3-carboxaldehydes with benzylidenetriphenyl phosphoranes: A new synthesis of 3-styrylchromones
Sandulache, Angela,Silva, Artur M. S.,Pinto, Diana C. G. A.,Almeida, Lucia M. P. M.,Cavaleiro, Jose A. S.
, p. 1592 - 1598 (2007/10/03)
An efficient route to 3-styrylchromones has been developed and applied to syntheses of several new derivatives. Wittig reactions of chromone-3- carboxaldehydes with some benzylic ylides gave a diastereomeric mixture of (E) and (Z)-3-styrylchromones that a
