22920-77-0Relevant academic research and scientific papers
Facile synthesis of 2-nitromethyl aromatic ketones by insertion of benzynes into the C-C bond of α-nitroketones
Hu, Ji-Hong,Zheng, Hong-Jie
supporting information, p. 558 - 562 (2019/01/25)
A facile method to synthesize 2-nitromethyl aromatic ketones was developed. In the method, benzyne was generated in situ for the insertion to α-Nitroketones in one pot to achieve 2-nitromethyl aromatic ketones under mild conditions. Aromatic and aliphatic α-nitroketones were applied in the reaction, and the results show that aliphatic α-nitroketones gave excellent yields (up to 96%), while aromatic α-nitroketones gave moderate yields. The synthesized 2-nitromethyl aromatic ketones could be potential substrates to synthesize isoindoles.
Enantio- & chemo-selective preparation of enantiomerically enriched aliphatic nitro alcohols using Candida parapsilosis ATCC 7330
Venkataraman, Sowmyalakshmi,Chadha, Anju
, p. 73807 - 73813 (2015/09/15)
Enantiomerically pure β- and γ-nitro alcohols were prepared from their respective nitro ketones by asymmetric reduction mediated by the biocatalyst, Candida parapsilosis ATCC 7330 under optimized reaction conditions (ee up to >99%; yields up to 76%). This
Phenylation reaction of α-acylnitromethanes to give 1,2-diketone monooximes: Involvement of carbon electrophile at the position a to the nitro group
Takamoto, Mikihiro,Kurouchi, Hiroaki,Otani, Yuko,Ohwada, Tomohiko
experimental part, p. 4129 - 4136 (2011/03/17)
The generality and the effects of substituents on phenylation reactions of α-acylnitromethanes catalyzed by trifluoromethanesulfonic acid have been studied. α-Aroylnitromethanes afforded benzil monooximes in good yield. In the case of aliphatic α-acylnitromethane, a similar phenylation reaction proceeded, but the yield of the phenylated 1,2-dione monooxime was low. These phenylation reactions represent examples of the generation of carbocation electrophiles at the α-position of a nitro group. Georg Thieme Verlag Stuttgart - New York.
Reaction of 2-Nitroenamines and 2-Nitroalkenyl Sulfides with Ethyl Isocyanoacetate. A Novel Synthesis of 1-Hydroxypyrazoles
Uno, Hidemitsu,Kinoshita, Tomohito,Matsumoto, Koji,Murashima, Takashi,Ogawa, Takuji,Ono, Noboru
, p. 570 - 581 (2007/10/03)
We have show that 1-hydroxypyrazoles can be prepared easily and regioselectively from the reaction of nitroenamines with ethyl isocyanoacetate. α,β-Unsaturated aci-nitronates are formed in the reaction and are then hydrolysed to give the products by quenching with acid.
Simple Preparation of α-Acyl α-Arylthio Oximes (N-Hydroxy-2-oxoalkanimidothioates): Ambident Reactivity of α-Nitro Ketones
Jung, Michael E.,Grove, David D.,Khan, Saeed I.
, p. 4570 - 4573 (2007/10/02)
A one-step synthesis of α-acyl α-phenylthio oximes by nucleophilic dehydration of α-nitro ketones is described.Treatment of the α-nitro ketones 7a-c (prepared by reaction of the sodium salt of nitromethane 6 with the acylimidazoles 5a-c) with thiophenol and titanium tetrachloride in the presence of triethylamine gave the phenyl N-hydroxy-2-oxoalkanimidothioates 4a-c in good yield.These products are potentially useful intermediates for the synthesis of analogues of the well known pesticides, methomyl, thiodicarb, and oxamyl.Interestingly, when the α-nitro ketones 7a-c are treated with thiophenol in the presence of boron trifluoride, only thioketalization is observed and the thioketals 8a-c are produced.The stereochemistry of the oxime hydroxyl in the crystal was shown to be syn to the phenylthio group, i.e., Z stereochemistry, by a single-crystal X-ray structure determination.A reasonable mechanistic explanation is presented to explain the reaction pathway.
Nitroacetylene Equivalents. Preparation and Cycloadditions of 2-Phenylsulphinyl-1-nitroalkenes
Jung, Michael E.,Grove, David D.
, p. 753 - 755 (2007/10/02)
β-Phenylsulphinyl-nitro-alkenes (7) are readily prepared from acyl imidazoles and react as nitroacetylene equivalents in Diels-Alder reactions to give good yields of cycloadducts and their further products.
PREPARATION AND OXIDATION OF α-NITRO ALCOHOLS WITH SUPPORTED REAGENTS.
Melot, Jean-Marie,Texier-Boullet, Francoise,Foucaud, Andre
, p. 493 - 496 (2007/10/02)
Preparation of 2-nitro alkanols has been achieved by condensation of aldehydes with nitroalkanes in the presence of alumina-supported potassium fluoride.Nitroketones are produced by oxidation of nitroalkanols with montmorillonite - supported chromium trioxide.
