- Method for synthesizing benzoxazole compound by using nitration by-products of aromatic hydrocarbon and application of benzoxazole compound
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The invention discloses a method for synthesizing a benzoxazole compound by using nitration by-products of aromatic hydrocarbon and application of the benzoxazole compound. The method comprises the main process: performing step-by-step crystallization on nitration products of a 2,4-dinitrochlorobenzene production enterprise so as to obtain 2,4-dinitrochlorobenzene, 2,6-dinitrochlorobenzene (I) anda small amount of residues, adopting the obtained 2,6-dinitrochlorobenzene (I) as the main starting material, and performing hydrolysis, selective catalytic hydrogenation reduction, cyclization, halogenation, carbon-carbon coupling and other processes so as to synthesize the benzoxazole compound, wherein the obtained compound can be used as a main raw material to synthesize a series of chemical intermediates with important application, and the chemical intermediates include o-aminophenol, 2-amino-4-nitrophenol, 2-amino-5-nitrophenol and hydrochloride of o-aminophenol, 2-amino-4-nitrophenol, 2-amino-5-nitrophenol. Through the method, the industrial by-products are converted into high value-added aromatic aminophenol products, industrial hazardous waste of the 2,4-dinitrochlorobenzene production enterprise is reduced, the scope of products of the enterprise is widened, and the economic benefits of enterprise are increased.
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- ANTIBACTERIAL HETEROCYCLIC DERIVATIVES
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The invention relates to antibacterial compounds of formula (I), wherein R1, M, R2, R3, and V are as described in the description, to their preparation, to salts thereof, and to their use as pharmaceuticals, to pharmaceutical compositions containing one or more compounds of formula (I), and especially to their use as antibacterial agents.
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Page/Page column 58
(2017/03/21)
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- METHODS FOR TREATING HEPATITIS C
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In accordance with the present invention, compounds that inhibit viral replication, preferably Hepatitis C Virus (HCV) replication, have been identified, and methods for their use provided. In one aspect of the invention, compounds useful in the treatment
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Page/Page column 445
(2010/10/20)
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- HIV INHIBITING 1,2,4-TRIAZIN-6-ONE DERIVATIVES
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The present invention relates to HIV replication inhibitors of formula (I) a N-oxide, a pharmaceutically acceptable addition salt, a quaternary amine or a stereochemically isomeric form thereof, wherein ring A and ring B represent phenyl, pyridyl, pyridaz
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Page/Page column 58
(2008/06/13)
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- Preparation and antifungal activity of 3-Iodo- and 6-Iodo-8-quinolinols
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3-Iodo- and 6-Iodo-8-quinolinols were prepared and tested against six fungi: Aspergillus niger, A. oryzae, Myrothecium verrucaria, Trichoderma viride, Mucor cirinelloides, and Trichophyton mentagrophytes in Sabouraud dextrose broth. A comparison with the previously known 5-iodo- and 7-iodo-8-quinolinols showed that the 6-iodo isomer was the most active.
- Gershon, Herman,Clarke, Donald D.,McMahon, John J.,Gershon, Muriel
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p. 1325 - 1330
(2007/10/03)
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