167073-09-8Relevant articles and documents
Novel process for synthesizing 2 -fluorocyclopropylamine with high selectivity and asymmetric synthesis
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Paragraph 0052-0053; 0060-0061, (2021/10/13)
A novel highly selective asymmetric synthesis process of 2 -fluorocyclopropylamine (Structural I). The method provided by the invention uses 1 - fluorine -1 - benzene (propylene) sulfonyl methane and chiral epichlorohydrin to construct chiral cyclopropane under basic conditions, and a new synthetic route not only achieves a special cis-trans selectivity, but also has a highly specific stereoselectivity. The synthesis route is efficient, the reaction condition is mild, the method is suitable for large industrial production in a green environment, 2 -fluorocyclopropylamine production cost is greatly reduced.
Stereoselective synthesis of cis -2-fluorocyclopropanecarboxylic acid
Shibue, Taku,Fukuda, Yasumichi
, p. 7226 - 7231 (2014/08/18)
A rhodium-catalyzed cyclopropanation of 1-fluoro-1-(phenylsulfonyl)ethylene and diazo esters is described as an effective method for the stereoselective synthesis of cis-2-fluorocyclopropanecarboxylic acid. This process provides an example of the cyclopro
Pyridonecarboxylic acid derivatives
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, (2008/06/13)
Quinolone derivatives are known as synthetic antimicrobial agents having a condensed pyridonecarboxylic acid skeleton, and those having substituents on various replaceable positions of said skeleton are known. In particular, if diastereomers exist, there are 4 or more kinds of stereoisomers. A mixture of diastereomers is a mixture of isomers having different physical properties and is difficult to apply as a drug as such. The present invention provides an antimicrobial 1-(1,2-cis-2-fluorocyclopropyl)-substituted quinolone derivative represented by formula I shown below which, although involving diastereomers, consists of a single stereoisomer. STR1 wherein R1 represents a methyl group, a difluoromethyl group, etc.; R2 represents a saturated nitrogen-containing heterocyclic group; A represents C--X3 or a nitrogen atom; X1 and X2 each represents a halogen atom; and X3 and Z represent a hydrogen atom, etc.