- Scale-up and safety evaluation of a sandmeyer reaction
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A scale-up of a new process for the production of 2-chloro-5- trifluoromethyl-benzonitrile by a Sandmeyer reaction of 2-Chloro-5- trifluoromethylaniline with copper cyanide/sodium cyanide is described. To ensure a safe implementation, a safety evaluation of the process was carried out, which is described in the following. The new process gives a better working environment and better productivity due to shorter reaction time.
- Nielsen, Martin Anker,Nielsen, Michael Kim,Pittelkow, Thomas
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- HCl·DMPU-assisted one-pot and metal-free conversion of aldehydes to nitriles
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We report an efficient HCl·DMPU assisted one-pot conversion of aldehydes into nitriles. The use of HCl·DMPU as both an acidic source as well as a non-nucleophilic base constitutes an environmentally mild alternative for the preparation of nitriles. Our protocol proceeds smoothly without the use of toxic reagents and metal catalysts. Diverse functionalized aromatic, aliphatic and allylic aldehydes incorporating various functional groups were successfully converted to nitriles in excellent to quantitative yields. This protocol is characterized by a broad substrate scope, mild reaction conditions, and high scalability. This journal is
- Hammond, Gerald B.,Mudshinge, Sagar R.,Potnis, Chinmay S.,Xu, Bo
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supporting information
p. 4161 - 4164
(2020/07/14)
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- Synthesis of nitriles from amines using nanoscale Co3O4-based catalysts via sustainable aerobic oxidation
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The selective oxidation of amines for the benign synthesis of nitriles under mild conditions is described. Key to success for this transformation is the application of reusable cobalt oxide-based nanocatalysts. The resulting nitriles constitute key precursors and central intermediates in organic synthesis.
- Natte, Kishore,Jagadeesh, Rajenahally V.,Sharif, Muhammad,Neumann, Helfried,Beller, Matthias
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supporting information
p. 3356 - 3359
(2016/04/09)
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- "Nanorust"-catalyzed benign oxidation of amines for selective synthesis of nitriles
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Organic nitriles constitute key precursors and central intermediates in organic synthesis. In addition, nitriles represent a versatile motif found in numerous medicinally and biologically important compounds. Generally, these nitriles are synthesized by traditional cyanation procedures using toxic cyanides. Herein, we report the selective and environmentally benign oxidative conversion of primary amines for the synthesis of structurally diverse aromatic, aliphatic and heterocyclic nitriles using a reusable "nanorust" (nanoscale Fe2O3)-based catalysts applying molecular oxygen.
- Jagadeesh, Rajenahally V.,Junge, Henrik,Beller, Matthias
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- Process for producing trifluoromethylbenzylamines
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The invention relates to a process for producing a trifluotomethylbenzylamine represented by the following general formula (1), 1where each R independently represents a halogen selected from the group consisting of fluorine, chlorine, bromine and iodine, an alkyl group having a carbon atom number of 1-4, an alkoxy group having a carbon atom number of 1-4, an amino group, a hydroxyl group or a trifluoromethyl group, and n represents an integer from 0 to 4. The process includes hydrogenating a trifluoromethylbenzonitrile by hydrogen in an organic solvent in the presence of ammonia and a catalyst containing a platinum group element. This trifluoromethylbenzonitrile is represented by the following general formula (2), 2where R and n are defined as above. With this process, it is possible to obtain the trifluoromethylbenzylamine at an extremely high yield.
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- Process for producing trifluoromethylbenzylamines
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The invention relates to a process for producing a trifluoromethylbenzylamine represented by the following general formula (1). This process includes hydrogenating a trifliuoromethylbenzonitrile represented by the following general formula (2) by hydrogen in an organic solvent in the presence of ammonia, using a Raney catalyst, where each R independently represents a halogen selected from the group consisting of fluorine, chlorine, bromine and iodine, an alkyl group having a carbon atom number of 1-4, an alkoxy group having a carbon atom number of 1-4, an amino group, a hydroxyl group or a trifluoromethyl group, and n represents an integer from 0 to 4, where R and n are defined as above. With this process, it is possible to obtain the trifluoromethylbenzylamine easily and inexpensively at an extremely high yield.
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