105340-85-0Relevant academic research and scientific papers
A catalyst-free method for the synthesis of 1,4,2-dithiazoles from isothiocyanates and hydroxylamine triflic acid salts
An, Zhenyu,Liu, Yafeng,Ren, Yi,Wang, Ting,Yan, Rulong
supporting information, p. 6206 - 6209 (2021/07/28)
A catalyst-free method for the preparation of 1,4,2-dithiazoles is developed by reactions of isothiocyanates with hydroxylamine triflic acid salts. This reaction achieves C-S, C-N, and S-N bond formation, and a range of products are obtained in moderate to good yields. The obvious feature is using shelf-stable hydroxylamine triflic acid salts as a N source to synthesize heterocycles under mild conditions.
Regioselective Radical Arene Amination for the Concise Synthesis ofortho-Phenylenediamines
Gillespie, James E.,Morrill, Charlotte,Phipps, Robert J.
supporting information, p. 9355 - 9360 (2021/07/19)
The formation of arene C-N bonds directly from C-H bonds is of great importance and there has been rapid recent development of methods for achieving this through radical mechanisms, often involving reactiveN-centered radicals. A major challenge associated with these advances is that of regiocontrol, with mixtures of regioisomeric products obtained in most protocols, limiting broader utility. We have designed a system that utilizes attractive noncovalent interactions between an anionic substrate and an incoming radical cation in order to guide the latter to the areneorthoposition. The anionic substrate takes the form of a sulfamate-protected aniline and telescoped cleavage of the sulfamate group after amination leads directly toortho-phenylenediamines, key building blocks for a range of medicinally relevant diazoles. Our method can deliver both free amines and monoalkyl amines allowing access to unsymmetrical, selectively monoalkylated benzimidazoles and benzotriazoles. As well as providing concise access to valuableortho-phenylenediamines, this work demonstrates the potential for utilizing noncovalent interactions to control positional selectivity in radical reactions.
NiH-Catalyzed Proximal-Selective Hydroamination of Unactivated Alkenes
Jeon, Jinwon,Lee, Changseok,Seo, Huiyeong,Hong, Sungwoo
supporting information, p. 20470 - 20480 (2020/11/27)
Reported herein is a modular, NiH-catalyzed system capable of proximal-selective hydroamination of unactivated alkenes with diverse amine sources. The key to the successful implementation of this approach is the promotion of NiH insertion into even highly substituted olefins via coordination of the bidentate directing group to the nickel complex. A wide range of primary and secondary amines can be installed in both internal and terminal unactivated alkenes with excellent regiocontrol under the optimized reaction conditions. This protocol is flexible and general for the preparation of a variety of valuable β- and γ-amino acid building blocks that would otherwise be difficult to synthesize. The utility of this transformation was further demonstrated by the site-selective late-stage modification of complex and medicinally relevant molecules. Combined experimental and computational studies illuminate the detailed reaction mechanism.
Method for preparing amine compound by alkali-catalyzed decarboxylation (by machine translation)
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Paragraph 0032, (2020/03/25)
The method is simple and convenient (reaction conditions ;), more stable,atom utilization rate, by-products are only carbon dioxide pollution, and the yield can reach. suitable for industrial production Curtis; and the method, Lossen is suitable for industrial production . The method disclosed by the invention is simple and convenient to operate under the action of a base as, rearrangement, rearrangement reaction of an alkyl, aryl or heterocyclic aromatic carboxylic acid or an ester and hydroxylamine compound, 90%. (by machine translation)
Controllable Intramolecular Unactivated C(sp3)-H Amination and Oxygenation of Carbamates
Guo, Qihang,Ren, Xiang,Lu, Zhan
supporting information, p. 880 - 884 (2019/05/16)
Dual catalyst-controlled intramolecular unactivated C(sp3)-H amination and oxygenation of carbamates merging visible-light photocatalysis and earth-abundant transition metal catalysis have been reported. Useful amino alcohol and diol derivatives could be selectively obtained from readily available tertiary alcohol derivatives. The possible mechanisms have been proposed via a 1,5-HAT process followed by Lewis acid-controlled cyclization. The nickel and zinc catalysts inhibit the formation of oxygenation and amination products, respectively. An interesting phenomenon of chirality transfer is also observed.
Base-Mediated Intramolecular Decarboxylative Synthesis of Alkylamines from Alkanoyloxycarbamates
Li, Peihe,Ma, Nuannuan,Wang, Zheng,Dai, Qipu,Hu, Changwen
, p. 8233 - 8240 (2018/05/31)
A general and effective method for the synthesis of alkylamine via intramolecular decarboxylation of alkanoyloxycarbamates is described. The alkanoyloxycarbamates are readily prepared with alkyl carboxylic acids and hydroxylamine. The reaction shows a broad range of substrates (primary and secondary alkyl) with functional tolerance, and the corresponding products were obtained in good yields under mild conditions.
Fe-Catalyzed Amination of (Hetero)Arenes with a Redox-Active Aminating Reagent under Mild Conditions
Liu, Jianzhong,Wu, Kai,Shen, Tao,Liang, Yujie,Zou, Miancheng,Zhu, Yuchao,Li, Xinwei,Li, Xinyao,Jiao, Ning
supporting information, p. 563 - 567 (2017/01/18)
A novel and efficient Fe-catalyzed direct C?H amination (NH2) of arenes is reported using a new redox-active aminating reagent. The reaction is simple, and can be performed under air, mild, and redox-neutral conditions. This protocol has a broad substrate scope and could be used in the late-stage modification of bioactive compounds. Mechanistic studies demonstrate that a radical pathway could be involved in this transformation.
Organocatalytic Asymmetric Synthesis of Chiral Dioxazinanes and Dioxazepanes with in Situ Generated Nitrones via a Tandem Reaction Pathway Using a Cooperative Cation Binding Catalyst
Liu, Yidong,Ao, Jun,Paladhi, Sushovan,Song, Choong Eui,Yan, Hailong
supporting information, p. 16486 - 16492 (2016/12/27)
Heterocyclic skeletons play major roles in pharmaceuticals and biological processes. Cycloaddition reactions are most suitable synthetic tools to efficiently construct chemically diverse sets of heterocycles with great structural complexity owing to the s
Rhodium-Catalyzed ortho-Amidations in the Preparation of Thiadiazine 1-Oxides
Cheng, Ying,Dong, Wanrong,Wang, Han,Bolm, Carsten
supporting information, p. 10821 - 10824 (2016/07/28)
Rhodium-catalyzed ortho-amidations of sulfoximines lead to key intermediates for the preparation of thiadiazine 1-oxides. Following a straightforward protocol, a variety of synthetically valuable compounds can be obtained, thus circumventing common multis
Palladium-Catalyzed Decarboxylative Synthesis of Arylamines
Dai, Qipu,Li, Peihe,Ma, Nuannuan,Hu, Changwen
, p. 5560 - 5563 (2016/11/17)
A novel approach has been developed for the synthesis of arylamines via the palladium-catalyzed intramolecular decarboxylative coupling (IDC) of aroyloxycarbamates, obtained in situ by reacting aryl carboxylic acids with hydroxycarbamates. The reaction offers facile access to structurally diverse arylamines with the site-specific formation of the C(sp2)-N bond under mild conditions.
