13670-99-0Relevant articles and documents
Pd-Catalysed direct C(sp2)-H fluorination of aromatic ketones: Concise access to anacetrapib
Wu, Qiuzi,Mao, Yang-Jie,Zhou, Kun,Wang, Shuang,Chen, Lei,Xu, Zhen-Yuan,Lou, Shao-Jie,Xu, Dan-Qian
supporting information, p. 4544 - 4547 (2021/05/17)
The Pd-cataylsed direct ortho-C(sp2)-H fluorination of aromatic ketones has been developed for the first time. The reaction features good regioselectivity and simple operations, constituting an alternative shortcut to access fluorinated ketones. A concise synthesis of anacetrapib has also been achieved by using late-stage C-H fluorination as a key step.
Redox-driven deracemization of secondary alcohols by sequential ether/O2-mediated oxidation and Ru-catalyzed asymmetric reduction
Yang, Bing,Cui, Peng,Chen, Yongsheng,Liu, Qixing,Zhou, Haifeng
supporting information, (2020/10/14)
The deracemization of benzylic alcohols has been achieved using a redox-driven one-pot two-step process. The racemic alcohols were oxidized by bis(methoxypropyl) ether and oxygen to give the ketone intermediates, followed by an asymmetric transfer hydrogenation with a chiral ruthenium catalyst. This compatible oxidation/reduction process gave the enantiomerically enriched alcohols with up to 95% ee values.
METHOD FOR PRODUCING BENZOYL FORMIC ACID COMPOUND AND PYRIDAZINE COMPOUND
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Paragraph 0091, (2020/12/18)
The present invention provides an industrially-advantageous process for preparing a benzoyl formic acid compound, and an efficient process for preparing a pyridazine compound using the same process. Specifically, the present invention provides a process for preparing a compound represented by formula (2), which comprises a step (B): a step of reacting a compound represented by formula (1) with a nitrosyl sulfuric acid in water to produce the compound represented by formula (2).
Stereoselective amination of racemic sec-alcohols through sequential application of laccases and transaminases
Martínez-Montero, Lía,Gotor, Vicente,Gotor-Fernández, Vicente,Lavandera, Iván
supporting information, p. 474 - 480 (2017/06/23)
A one-pot/two-step bienzymatic asymmetric amination of secondary alcohols is disclosed. The approach is based on a sequential strategy involving the use of a laccase/TEMPO catalytic system for the oxidation of alcohols into ketone intermediates, and their following transformation into optically enriched amines by using transaminases. Individual optimizations of the oxidation and biotransamination reactions have been carried out, studying later their applicability in a concurrent process. Therefore, 17 racemic (hetero) aromatic sec-alcohols with different substitutions in the aromatic ring have been converted into enantioenriched amines with good to excellent selectivities (90-99% ee) and conversion values (67-99%). The scalability of the process was also demonstrated when two different amine donors were used in the transamination step, such as isopropylamine and cis-2-buten-1,4-diamine. Satisfyingly, both sacrificial amine donors can shift the equilibrium toward the amine formation, leading to the corresponding isolated enantioenriched amines with good to excellent results.
METHOD FOR PRODUCING 2,6-DIFLUOROBENZOYLFORMATE COMPOUND
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Paragraph 0021, (2017/06/09)
PROBLEM TO BE SOLVED: To provide a novel production method for a 2,6-difluorobenzoylformate compound. SOLUTION: A compound represented by formula (4) [where R1 is a halogen atom, n is an integer of 0-3] is oxidized in a nitric acid aqueous solution of up to 20% to produce a 2,6-difluorobenzoylformate compound represented by formula (1) [where R1 and n have the same meanings as mentioned above]. SELECTED DRAWING: None COPYRIGHT: (C)2016,JPOandINPIT
METHOD FOR PREPARING 2,6-DIFLUOROACETOPHENONES
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Page/Page column 23, (2013/06/27)
Disclosed are methods for preparing compounds of Formula 1 utilizing an intermediate of Formula 4 or an intermediate of Formula 6., Also disclosed are compounds of Formula 4.
Enantioselective oxidation of racemic secondary alcohols catalyzed by chiral Mn(iii)-salen complexes with N-bromosuccinimide as a powerful oxidant
Xu, Daqian,Wang, Shoufeng,Shen, Zhiqiang,Xia, Chungu,Sun, Wei
supporting information, p. 2730 - 2732 (2012/11/07)
We demonstrate an efficient enantioselective oxidation of secondary alcohols catalyzed by Mn(iii)-salen complex using N-bromosuccinimide (NBS) as the oxidant. The new protocol is very efficient for the oxidative kinetic resolution of a variety of secondary alcohols, including ortho-substituted benzylic alcohols. The Royal Society of Chemistry 2012.
METHOD FOR METAL-ORGANIC PRODUCTION OF ORGANIC INTERMEDIATE PRODUCTS BY MEANS OF ARYL LITHIUM-BASES
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Page/Page column 15, (2010/02/06)
The invention relates to a method for the production of substituted aromatic compounds by producing lithium arylene and by reacting it with suitable electrophiles. The method comprises the following steps (step 1); an aryl lithium compound ( auxiliary base'') is initially produced by reacting a halogen aromatic compound with lithium metal; said compound is subsequently (step 2) reacted for deprotonation of the aromatic substrate in order to form the corresponding lithium aromatic compound which is subsequently (step 3) reacted with a corresponding electrophile to form the desired substituted aromatic compound, see page 2 of the description.
Antibacterial agents
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, (2008/06/13)
Novel quinoline-carboxylic acids as antibacterial agents are described as well as methods for their manufacture, formulation, and use in treating bacterial infections including the description of certain novel intermediates used in the manufacture of the antibacterial agents.