13229-92-0Relevant articles and documents
Organo Photoinduced Decarboxylative Alkylation of Coumarins with N-(Acyloxy)phthalimide
Tripathi, Krishna N.,Belal, Md.,Singh, Ravi P.
, p. 1193 - 1201 (2020)
A metal-free and mild, photoinduced decarboxylative 4-position alkylation of coumarins has been reported. Photoinduced single electron transfer has been initiated by utilizing the visible-light absorptivity of Eosin Y for a reductive generation of alkyl r
Sonochemistry as a General Procedure for the Synthesis of Coumarins, Including Multigram Synthesis
Da Silveira Pinto, Ligia S.,De Souza, Marcus V. N.
, p. 2677 - 2682 (2017)
This study describes a general procedure for the synthesis of different coumarins via sonochemistry using active methylene compounds and 2-hydroxybenzaldehydes or resorcinol. The application of sonochemistry for the synthesis of these compounds was also very effective on a multigram scale with a higher yield, higher amount of crystalline compound, and shorter reaction time compared with the compounds obtained using the classical procedures.
ZrCl4/[bmim]BF4-catalyzed condensation of salicylaldehydes and malononitrile: Single-step synthesis of 3-cyanocoumarin derivatives
Valizadeh, Hassan,Mahmoodian, Manzar,Gholipour, Hamid
, p. 799 - 802 (2011)
Figure represented. A versatile and efficient single-step route to 3-cyanocoumarins via Knoevenagel condensation of salicylaldehydes and malononitrile using ZrCl4 as the catalyst (15 mol %) in ionic liquid 1-(n-butyl)-3-methylimidazolium tetrafluoroborate as reaction medium and catalyst is described. The novel procedure features single step, short reaction time, good yields, and simple workup.
One-Pot Green Synthesis of 2-Oxo-2H-chromene-3-carbonitriles Using Dual-Frequency Ultrasonication
Aruna,Kumar, S.,Sharma, S. P.,Vashisht, N.
, p. 1508 - 1512 (2021/10/26)
Abstract: A green synthesis of 2-oxo-2H-chromene-3-carbonitriles has been carried out in one step by reacting 2-hydroxybenzaldehydes or 2-hydroxyacetophenones with ethyl cyanoacetate under dual-frequency ultrasonica-tion (ultrasonic bath of 40 KHz and probe of 20 KHz). The compounds were obtained in very high yield, and their structures were confirmed by IR and NMR data.