54811-38-0Relevant articles and documents
ETHYNYL COMPOUNDS, THEIR PREPARATION AND THEIR THERAPEUTIC USE FOR THE TREATMENT OF MALARIA
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Page/Page column 44, (2019/01/21)
The present disclosure relates to compounds of formula (I) or a pharmaceutically acceptable salt thereof wherein R1 means a fluorine atom or a perhalogeno linear alkyl radical containing 1, 2 or 3 carbon atoms; R2 means a chlorine atom, a linear alkyl radical containing 1, 2 or 3 carbon atoms or a perhalogeno linear alkyl radical containing 1, 2 or 3 carbon atoms, and R means a hydrogen atom or a radical of formula (la). The present disclosure also relates to processes for their preparation as well their therapeutic uses, in particular such as for use in the treatment of malaria.
METHOD FOR PRODUCING HALOGENATED BENZENE DERIVATIVE
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Paragraph 0075; 0076; 0077; 0078; 0079; 0080; 0081-0088, (2018/06/30)
PROBLEM TO BE SOLVED: To provide a method for producing a halogenated benzene derivative, which is highly efficient and economically advantageous. SOLUTION: The method produces a halogenated benzene derivative represented by formula (2) by reacting a benzene derivative represented by formula (1) with a halogenating agent selected from N-halogen succinimide and the like in the presence of an acid selected from sulfuric acid and methanesulfonic acid. (R1 is H, a hydroxyl group, or an alkoxy group; R2 and R3 are each independently H or a hydrocarbon group; a is an integer of 1-4; b is an integer of 1-4; a+b is an integer of 2-5; X is a halogen atom; c is an integer of 1-4; and a+b+c is an integer of 3-6). SELECTED DRAWING: None COPYRIGHT: (C)2018,JPO&INPIT
N-Iodosuccinimide (NIS) in Direct Aromatic Iodination
Bergstr?m, Maria,Suresh, Ganji,Naidu, Veluru Ramesh,Unelius, C. Rikard
, p. 3234 - 3239 (2017/06/21)
N-Iodosuccinimide (NIS) in pure trifluoroacetic acid (TFA) offers a time-efficient and general method for the iodination of a wide range of mono- and disubstituted benzenes at room temperature, as demonstrated in this paper. The starting materials were generally converted into mono-iodinated products in less than 16 hours at room temperature, without byproducts. A few deactivated substrates needed addition of sulfuric acid to increase the reaction rate. Another exception was methoxybenzenes that preferentially were iodinated by NIS in acetonitrile with only catalytic amounts of TFA.