57544-29-3Relevant academic research and scientific papers
Assembly of fully substituted triazolochromenes via a novel multicomponent reaction or mechanochemical synthesis
Vroemans, Robby,Verhaegen, Yenthel,Dieu, My Tran Thi,Dehaen, Wim
supporting information, p. 2689 - 2697 (2018/11/03)
A new metal-free one-pot three-component procedure towards fully substituted triazolochromenes has been developed, starting from commercially available materials. Salicylaldehydes and nitroalkenes were reacted under solvent-free conditions, followed by a
Catalyst-free 1,3-dipolar cycloaddition of 3-nitrochromen with sodium azide: a facile method for the synthesis of 4-aryl-1,4-dihydrochromeno[4,3-d][1,2,3]triazole derivatives
Habib, Pateliya Mujjamil,Rama Raju,Kavala, Veerababurao,Kuo, Chun-Wei,Yao, Ching-Fa
scheme or table, p. 5799 - 5804 (2009/12/06)
1,3-Dipolar cycloaddition of 3-nitrochromen with sodium azide under catalyst-free conditions afforded 4-aryl-1,4-dihydrochromeno[4,3-d][1,2,3]triazole derivatives at 80 °C in DMSO is described. The generality of this reaction was demonstrated by synthesiz
The synthesis of 2,2-disubstituted 3-nitrochromenes from salicylaldehyde and 2,2-disubstituted 1-nitroalkenes
Yan, Ming-Chung,Jang, Yeong-Jiunn,Kuo, Wen-Yu,Tu, Zhijay,Shen, Kao-Hsien,Cuo, Ting-Shen,Ueng, Chuen-Her,Yao, Ching-Fa
, p. 1033 - 1048 (2007/10/03)
Reactions of salicylaldehyde (1) with β-nitrostyrenes (2), (4), and (6) in the presence of 1,4-diazabicyclo[2.2.2] octane (DABCO) without the use of solvent at 40 °C gave high yields of the corresponding 3-nitrochromenes, respectively. Other conjugated ni
An easy and efficient method for the synthesis of 2,2-dialkyl-3-nitrochromene
Yan, Ming-Chung,Jang, Yeong-Jiunn,Yao, Ching-Fa
, p. 2717 - 2721 (2015/09/10)
Reactions of salicylaldehyde 1, 1,4-diazabicyclo[2.2.2]octane (DABCO), with β-nitrostyrenes 2, 4, 12, 14, and 16, respectively, in the absence of solvent at 40°C gave high yields of 3-nitro-chromenes. Only 96% of trans-3-nitro-4-hydroxyflavans 7 or 98% of 10 were isolated when compounds 6 or 9 reacted with 1 and DABCO under similar conditions. When the reaction temperature was increased to 90°C, 7 and 10 underwent dehydration to generate 74% of 8 and 89% of 11.
A Convenient Method for the Preparation of Nitro Olefins by Nitration of Olefins with Nitrogen Monoxide
Hata, Eiichiro,Yamada, Tohru,Mukaiyama, Teruaki
, p. 3629 - 3636 (2007/10/03)
Olefins with a terminal double bond or conjugated with aromatic nucleus are successfully nitrated into nitro olefins in good-to-high yields on treatment with nitrogen monoxide (NO) in 1,2-dichloroethane.Nitro alcohols formed as by-products are dehydrated to yield nitro olefins by the subsequent treatment with acidic activated alumina.By GC analysis, it was confirmed that an equimolar amount of nitro gas was evolved during the present nitration.A possible reaction pathway including the formation of nitro nitroso compounds, key intermediates, is described.The key intermediates are transformed into nitro olefins by reaction with nitrogen monoxide.
