66346-55-2Relevant academic research and scientific papers
FeCl3-catalysed ultrasonic-assisted, solvent-free synthesis of 4-substituted coumarins. A useful complement to the Pechmann reaction
Prousis, Kyriakos C.,Avlonitis, Nicolaos,Heropoulos, Georgios A.,Calogeropoulou, Theodora
, p. 937 - 942 (2014/02/14)
The catalytic activity of FeCl3 for the synthesis of a variety of 4-substituted coumarins using high energy techniques has been investigated. The ultrasonic-assisted conditions provide a useful complement to the Pechmann reaction, affording the coumarin derivatives in excellent yields, under solvent-free conditions, in short reaction times using an inexpensive, mild and benign Lewis acid catalyst.
Synthesis of substituted coumarins via Bronsted acid mediated condensation of allenes with substituted phenols or anisoles
Kim, Sundae,Kang, Dongjin,Lee, Chang-Hee,Lee, Phil Ho
experimental part, p. 6530 - 6537 (2012/10/08)
Coumarins were obtained from the condensation of electron-rich arenes with allenes in the presence of TfOH in good yield. Depending on the substituent pattern of allenes employed, the general synthetic method of 4-substituted and 3,4-disubstituted 3-arylc
Concise Synthesis of Anti-HIV-1 Active (+)-Inophyllum B and (+)-Calanolide A by Application of (-)-Quinine-Catalyzed Intramolecular Oxo-Michael Addition
Sekino, Etsuko,Kumamoto, Takuya,Tanaka, Tomohiro,Ikeda, Tomoko,Ishikawa, Tsutomu
, p. 2760 - 2767 (2007/10/03)
(-)-Quinine-catalyzed intramolecular oxo-Michael addition (IMA) of 7-hydroxy-5-methoxy-8-tigloylcoumarins was developed for the enantioselective construction of 2,3-dimethyl-4-chromanone systems in the context of the asymmetric synthesis of anti-HIV-1 act
Solvent effects on stereoselectivity in 2,3-dimethyl-4-chromanone cyclization by quinine-catalyzed asymmetric intramolecular oxo-Michael addition
Tanaka, Tomohiro,Kumamoto, Takuya,Ishikawa, Tsutomu
, p. 4633 - 4637 (2007/10/03)
Examination of the quinine-catalyzed asymmetric intramolecular oxo-Michael addition of o-tigloylphenol in various solvents led to high stereoselectivity in chromanone cyclization when chlorobenzene was used as a solvent, giving cis-2,3-dimethyl-4-chromano
PREPARATION D'α-OXY-ALKYL-4 COUMARINES, MODELES D'INSECTICIDES NATURELS
Ramiandrasoa, F.,Kunesch, N.,Kunesch, G.,Poisson, J.
, p. 177 - 180 (2007/10/02)
The synthesis of 4-(α-hydroxy-alkyl)-5,7-dihydroxy coumarins as analogs of insecticidal coumarins is described.Oxidation through SeO2 or bromination by crown-ether catalysed substitution provide the functionalization of the 4-alkyl chain.Both reactions depend on the substitution of the phenolic groups.
A Novel Synthesis of 4-Propyl-2H-1-benzopyran-2-ones
Ahluwalia, Vinod K.,Singh, Rishi P.,Tripathi, Rama P.
, p. 765 - 768 (2007/10/02)
Reaction of 2-hydroxybutyrophenones 1-5 with ethoxycarbonylmethylenetriphenylphosphorane furnishes the 4-propyl-2H-1-benzopyran-2-ones 6-10. - Keywords: Ethoxycarbonylmethylenetriphenylphosphorane; 2-Hydroxy-butyrophenones; Insecticidal properties; 4-Prop
