1202-32-0Relevant academic research and scientific papers
Substrate promiscuity of ortho-naphthoquinone catalyst: Catalytic aerobic amine oxidation protocols to deaminative cross-coupling and n-nitrosation
Kim, Hun Young,Oh, Kyungsoo,Si, Tengda
, p. 9216 - 9221 (2019/10/08)
ortho-Naphthoquinone-based organocatalysts have been identified as versatile aerobic oxidation catalysts. Primary amines were readily cross-coupled with primary nitroalkanes via deaminative pathway to give nitroalkene derivatives in good to excellent yields. Secondary and tertiary amines were inert to ortho-naphthoquinone catalysts; however, secondary nitroalkanes were readily converted by ortho-naphthoquinone catalysts to the corresponding nitrite species that in situ oxidized the amines to the corresponding N-nitroso compounds. Without using harsh oxidants in a stoichiometric amount, the present catalytic aerobic oxidation protocol utilizes the substrate promiscuity feature to provide a facile access to amine oxidation products under mild reaction conditions.
Synthesis of Benzo[4,5]imidazo[2,1-b]thiazole by Copper(II)-Catalyzed Thioamination of Nitroalkene with 1H-Benzo[d]imidazole-2-thiol
Jana, Sourav,Chakraborty, Amrita,Shirinian, Valerii Z.,Hajra, Alakananda
supporting information, p. 2402 - 2408 (2018/05/08)
A Copper(II)-catalyzed thioamination of β-nitroalkene with 1H-benzo[d]imidazole-2-thiol has been developed for the synthesis of benzo[4,5]imidazo[2,1-b]thiazole derivatives. A variety of N-fused benzoimidazothiazole derivatives are obtained in high yields through successive C?N and C?S bond formations. This protocol is also applicable to β-substituted β-nitroalkenes to afford 2,3-disubstituted benzoimidazothiazoles. (Figure presented.).
Continuous-flow synthesis using a column reactor packed with heterogeneous catalysts: A convenient production of nitroolefins by using amino-functionalized silicagel
Ishitani, Haruro,Furiya, Yuichi,Kobayashi, Shū
supporting information, p. 6229 - 6232 (2017/09/30)
A continuous-flow synthesis of β-nitroolefins by using heterogeneous base catalysts has been developed. Although the use of an excess amount of nitro-donor such as nitromethane is required in conventional methods, nearly equimolar amounts of nitro-donors and carbonyl compounds are sufficient for high-yielding production of nitroolefins. Catalysts for this flow protocol are inexpensive and abundant, and high durability and high productivity were also realized by using an appropriate second support.
Iron-catalyzed tandem one-pot addition and cyclization of the blaise reaction intermediate and nitroolefins: Synthesis of substituted NH-pyrroles from nitriles
Zhao, Mi-Na,Liang, Hao,Ren, Zhi-Hui,Guan, Zheng-Hui
supporting information, p. 221 - 226 (2013/03/13)
The iron-catalyzed addition and cyclization of the Blaise reaction intermediate and nitroolefins to synthesize highly functionalized NH-pyrroles in a tandem one-pot manner from nitriles has been developed. This reaction shows good functional group tolerance and affords a broad spectrum of substituted NH-pyrroles in good yields. Copyright
Minute synthesis of electrophilic alkenes under microwave irradiation
Ayoubi,Texier-Boullet,Hamelin
, p. 258 - 260 (2007/10/02)
Condensation of carbonyl derivatives 2 with active methylene compounds 1 is efficiently achieved, within 3 to 15 minutes under microwave irradiation by a solvent free reaction in the presence of carefully adjusted amounts of piperidine leading to Knocvenagel products 3 in good to excellent yields.
Cathodic Reduction of 1-Nitroalkenes to Oximes and Primary Amines
Wessling, Michael,Schaefer, Hans J.
, p. 2303 - 2306 (2007/10/02)
1-Nitroalkenes are reduced in high yields at -0.3 to -0.5 V (vs.SCE) at a mercury or graphite cathode to oximes.At higher cathodic reduction potentials (-1.1 V) primary amines are selectively obtained in fair yields.Nitroalkadienes are selectively reduced at the double bond conjugated with the nitro group to either the oxime or amine.Key Words: Electrochemistry / 1-Nitroalkenes, reduction of / Oximes / Amines
