- The Use of Potassium/Sodium Nitrite as a Nitrosating Agent in the Electrooxidative N-Nitrosation of Secondary Amines
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We report herein on the electrochemical N-nitrosation of secondary amines using widely available sodium/potassium nitrite as a nitrosating agent. This approach not only eliminates the need for using a combination of sodium/potassium and a strong acid but also has good functional group tolerance. The reaction is compatible with the late-stage modification of pharmaceutical compounds and could be conducted in gram scale with a high reaction efficiency. Preliminary mechanistic studies indicate that the N-nitrosation occurs via the anodic oxidation of KNO2 into an NO2 radical which is then transformed into an NO+ cation.
- Chen, Zuxing,Gao, Meng,Lu, Cuifen,Ma, Chao,Ruan, Mengyao,Wang, Feiyi,Wang, Ying,Yang, Guichun,You, Shiqi
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supporting information
p. 3289 - 3293
(2021/07/02)
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- N-nitrosation of secondary amines using supported perchloric acid on silica gel and stereoselectivity study of nitrosated products
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N-Nitrosation of different types of secondary amines has been proceeded using supported perchloric acid on silica gel and sodiume nitrite under heterogeneous conditions. The operational system is simple and high pure products can be easily isolated with good to high yields.
- Goudarziafshar, Hamid,Ghorbani-Choghamarani, Arash,Hadian, Laila
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p. 1272 - 1276
(2014/04/03)
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- Facile N-nitrosation of secondary amines using poly(N,N'-dibromo-Nethylene- benzene-1,3-disulfonamide) and N,N,N′,N′-tetrabromobenzene-1,3- disulfonamide/NaNO2 under mild conditions
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In this research project, a combination of poly(N,N′-dibromo-N- ethylene-benzene-1,3-disulfonamide) [PBBS] and/or (N,N,N′,N′- tetrabromobenzene-1,3-disulfonamide) [TBBDA] with sodium nitrite in the presence of wet SiO2 (50% w/w) was used as an efficient nitrosating agent for the conversion of secondary amines to their corresponding nitroso compounds. N-Nitrosation reaction has been performed in dichloromethane at room temperature under mild and heterogeneous conditions. The reaction is operationally simple and corresponding products were achieved in good to excellent yields.
- Ghorbani-Vaghei, Ramin,Shiri, Lotfi,Ghorbani-Choghamarani, Arash
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p. 204 - 208
(2013/07/26)
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- Ionic liquid 1-(4-nitritobutyl)-3-methylimidazolium chloride as a new reagent for the efficient N-nitrosation of secondary amines under mild conditions
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1-(4-Nitritobutyl)-3-methylimidazolium chloride has been developed as a new reagent for efficient nitrosation of secondary amines at 0 °C to room temperature. A variety of N-nitrosamines were prepared in excellent yields by use of this task-specific ionic liquid under mild and heterogeneous conditions.
- Valizadeh, Hassan,Gholipour, Hamid,Shomali, Ashkan
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experimental part
p. 467 - 470
(2012/06/15)
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- 1-butyl-3-methylimidazolium nitrite as a reagent for the efficient n-nitrosation of secondary amines
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1-Butyl-3-methylimidazolium nitrite, [bmim]NO2 was used as a new effective reagent for the preparation of N-nitrosamines from the corresponding secondary amines at 0 °C to room temperature, under mild conditions in good to excellent yields.
- Valizadeh,Gholipour
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experimental part
p. 857 - 861
(2012/06/18)
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- Ph3P/Br2/n-Bu4NNO2 as an efficient system for the preparation of N-nitrosamines and azides
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The combination PPh3/Br2/n-Bu4NNO2 was developed as a new reagent system for the efficient preparation of N-nitrosamines and azides from the corresponding amines and hydrazine derivatives, respectively, at 0 °C to room temperature, in excellent yields.
- Iranpoor, Nasser,Firouzabadi, Habib,Nowrouzi, Najmeh
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p. 4242 - 4244
(2008/09/20)
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- Selective N-nitrosation of amines, N-alkylamides and N-alkylureas by N2O4 supported on cross-linked polyvinylpyrrolidone (PVP-N2O4)
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N2O4 was supported on the cross-linked polyvinylpyrrolidone (PVP) to afford a solid, stable and recyclable nitrosating agent. This reagent shows excellent selectivity for N-nitrosation of dialkyl amines in the presence of diaryl-, arylalkyl-, trialkylamines and also for secondary amides in dichloromethane at room temperature under mild and heterogeneous conditions. Also N-nitroso-N-alkyl amides can be selectively prepared in the presence of primary amides and N-phenylamides under similar reaction conditions. Selective N-nitrosation or dealkylation and N-nitrosation of tertiary amines can also be performed by this reagent.
- Iranpoor, Nasser,Firouzabadi, Habib,Pourali, Ali-Reza
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p. 1591 - 1597
(2007/10/03)
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