1-Acetonaphthone - CAS 941-98-0
Catalog number: 941-98-0
Category: Main Product
Molecular Formula:
Molecular Weight:
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Light yellow liquid.
Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances.
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1.Chemistry of the enaminone of 1-acetylnaphthalene under microwave irradiation using chitosan as a green catalyst.
Hassaneen HM1. Molecules. 2011 Jan 17;16(1):609-23. doi: 10.3390/molecules16010609.
Enaminone 1 was reacted with hydrazonoyl halides 2a-d to yield 3,4-disubstituted pyrazoles 6a-d. Coupling with arenediazonium chlorides afforded the 2-(arylhydrazono)-3-(1-naphthalenyl)-3-oxopropionaldehydes 13a-c. Compounds 13 could be utilized for the synthesis of a variety of arylpyrazoles, arylazolopyrimidines, and pyridazinones via reaction with hydrazines, aminoazoles, and active methylene derivatives, respectively. A comparative study of aforementioned reactions was carried out with chitosan as a basic ecofriendly catalyst under conventional heating as well as under pressurized microwave irradiation conditions.
2.Chemistry of Monomeric and Dinuclear Non-Oxido Vanadium(IV) and Oxidovanadium(V) Aroylazine Complexes: Exploring Solution Behavior.
Dash SP1, Majumder S1, Banerjee A1, Carvalho MF2, Adão P2, Pessoa JC2, Brzezinski K3, Garribba E4, Reuter H5, Dinda R1. Inorg Chem. 2016 Feb 1;55(3):1165-82. doi: 10.1021/acs.inorgchem.5b02346. Epub 2016 Jan 20.
A series of mononuclear non-oxido vanadium(IV) [V(IV)(L(1-4))2] (1-4), oxidoethoxido vanadium(V) [V(V)O(L(1-4))(OEt)] (5-8), and dinuclear μ-oxidodioxidodivanadium(V) [V(V)2O3(L(1))2] (9) complexes with tridentate aroylazine ligands are reported [H2L(1) = 2-furoylazine of 2-hydroxy-1-acetonaphthone, H2L(2) = 2-thiophenoylazine of 2-hydroxy-1-acetonaphthone, H2L(3) = 1-naphthoylazine of 2-hydroxy-1-acetonaphthone, H2L(4) = 3-hydroxy-2-naphthoylazine of 2-hydroxy-1-acetonaphthone]. The complexes are characterized by elemental analysis, by various spectroscopic techniques, and by single-crystal X-ray diffraction (for 2, 3, 5, 6, 8, and 9). The non-oxido V(IV) complexes (1-4) are quite stable in open air as well as in solution, and DFT calculations allow predicting EPR and UV-vis spectra and the electronic structure. The solution behavior of the [V(V)O(L(1-4))(OEt)] compounds (5-8) is studied confirming the formation of at least two different types of V(V) species in solution, monomeric corresponding to 5-8, and μ-oxidodioxidodivanadium [V(V)2O3(L(1-4))2] compounds.
3.N- vs O-protonation and the transannular substituent interaction in 8-(Dimethylamino)-1-acetonaphthone
Schuster II II1, Freyer AJ, Rheingold AL. J Org Chem. 2000 Sep 8;65(18):5752-9.
Dynamic NMR measurements of 8-(dimethylamino)-1-acetonaphthone 1 in neutral solutions reveal a solvent dependency of the barrier to NMe group interchange similar to that reported for N,N-dimethylacetamide. Titrating 1 with TFA in solvents of varying donicities gives rise to equilibrium mixtures of N-protonated aminoketone 2 and the O-protonated transannular addition product 3, the interconversion rate of which is slow on the NMR time scale at ambient temperature. The preference for O- or N-protonation is medium-dependent, the amount of N-protonated 2 increasing with a decrease in the nucleophilicity of the solvent. The set of equilibria which govern the interconversion of 2 and 3 in the titration mixtures are identified and their equilibrium constants evaluated from the NMR data. X-ray analysis of the crystalline trifluoroacetate salt of O-protonated 3 indicates that the transannular N.CO bond of 3 is formed to an extent of only 80%. The equilibrium distribution of 2 and 3, paired with the tetrafluoroborate anion, depends on both the nucleophilicity and the polarity of the solvent.
4.Synthesis of 1-amino-2-aroyl/acetylnaphthalenes through a base mediated one pot inter and intramolecular C-C bond formation strategy.
Singh S1, Yadav P, Sahu SN, Althagafi I, Kumar A, Kumar B, Ram VJ, Pratap R. Org Biomol Chem. 2014 Jul 14;12(26):4730-7. doi: 10.1039/c4ob00432a.
A new precursor 2-(1-cyano-2,2-bis(methylthio)vinyl)benzonitrile has been synthesized by the reaction of 2-cyanomethylbenzonitrile, carbon disulfide and methyl iodide under basic conditions. The reaction of 2-(1-cyano-2,2-bis(methylthio)vinyl)benzonitrile with various functionalized aryl/heteroaryl methyl ketones or acetone under basic conditions afforded 4-amino-3-aroyl/heteroaroyl/acetyl-2-methylsulfanylnaphthalene-1-carbonitriles in good yields through a (5C + 1C) annulation strategy; this involves sequential intermolecular, followed by intramolecular, C-C bond formation reactions. The structure of the product was confirmed by single crystal X-ray crystallography.
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