138197-46-3Relevant academic research and scientific papers
Preparation and characterization of a novel organic–inorganic hybrid nanostructure: application in synthesis of spirocompounds
Ahadi, Najmieh,Bodaghifard, Mohammad Ali,Mobinikhaledi, Akbar
, p. 3277 - 3294 (2020/05/25)
Abstract: Immobilization and heterogenization of acidic/basic groups or organic tags on inorganic supports have found many important applications in recent years. In this investigation, a new hybrid organic–inorganic nanostructure was prepared. The struct
N-Sulfonic acid modified poly(styrene-co-maleic anhydride): An efficient and recyclable solid acid catalyst for the synthesis of a wide range of spiropyrans
Heravi, Majid M.,Hashemi, Elaheh,Azimian, Fereshteh
, p. 647 - 653 (2015/03/05)
N-Sulfonic acid modified poly(styrene-co-maleic anhydride) as a recyclable solid acid catalyst efficiently catalyzed the one-pot three-component synthesis of spiropyran derivatives through a simple, convenient, and cost-effective approach in good yields a
Highly convergent one-pot four-component regioselective synthesis of spiro-pyranopyrazoles and oxa-aza-[3.3.3]propellanes
Alizadeh, Abdolali,Bayat, Fahimeh
, p. 694 - 700 (2014/06/09)
A concise and efficient route for the synthesis of spiro-pyranopyrazoles and oxa-aza-[3.3.3]propellanes by simple regioselective multicomponent reaction of ninhydrin, malononitrile, hydrazine derivatives, and β-keto esters or dimethyl acetylenedicarboxylate was developed. This protocol provides an alternative method for combinatorial and parallel syntheses in drug discovery. The value of this method lies in its simplicity, regioselectivity, and good yields. The structures of 3 and 4 were corroborated spectroscopically (IR, 1H- and 13C-NMR, and EI-MS). A plausible mechanism for this type of reaction is proposed (Schemes 2 and 3). Copyright
Syntheses with Nitriles, 88 : Spiropyrazoles> by Reaction of Cyanomethylene Derivatives with Pyrazolones
Dworczak, Renate
, p. 731 - 737 (2007/10/02)
The reactivity of cyanomethylene-indolones (1a-e) and 2-(dicyanomethylene)-indan-1,3-dione (4) towards 1,5-disubstituted 3-pyrazolones (2a-c) was investigated.The reactions yield spiropyrazoles> (3a-e, 5a
