Abstract:
Compounds effective in inhibiting replication of Hepatitis C virus (“HCV”) are described. This invention also relates to processes of making such compounds, compositions comprising such compounds, and methods of using such compounds to treat HCV infection.
Abstract:
This application discloses provides a process for the introduction of nitro-group functionality into a compound which contains also a site of unsaturation and/or oxygen functionality by direct (one step) oxidation of an oxime functional group mediated by a molybdenum VI/VII peroxo complex, the process comprising: (a) providing a substrate of Formula I containing an oxime functional group; wherein R1 and R2 are selected independently from linear, branched or cyclic alkyl and linear, branched or cyclic alkenyl groups, optionally substituted, with the proviso that at least one of R1 or R2 contains a carbon/carbon double bond; and (b) contacting said substrate of Formula I with a molybdenum oxidation complex, thereby oxidizing said oxime functional group to a nitro functional group to yield the structure of Formula III. Where R1 and R2 are as defined above.
Abstract:
A process for selectively forming nitrohydrocarbon compounds by contacting, at elevated temperature and pressure and in a homogeneous gas phase, an olefinic unsaturated compound having at least three carbon atoms with NO.sub.2 alone or in the presence of oxygen and/or water.
Abstract:
A process for selectively forming nitroalkanes and nitroaromatics by contacting, at elevated temperature and pressure and in a homogeneous gas phase, an organic carboxylic acid having from two to ten carbon atoms with NO.sub.2 alone or in the presence of oxygen and/or water.
Abstract:
An improved process for forming nitroparaffins by gaseous phase nitration of hydrocarbons higher than methane. The improvement comprises carrying out the nitration in the presence of a small amount of at least one carboxylic acid, preferably acetic acid.
Abstract:
Esters, ketones, nitriles and nitro compounds bearing an .alpha.-nitro substituent react with certain salts of aliphatic nitro compounds with displacement of the .alpha.-nitro substituent. The resulting products are esters, ketones, nitriles and nitro compounds bearing a .beta.-nitro substituent. Very good yields of the products are obtained when the reaction is run in an aprotic solvent. The .beta.-nitro products are useful in the treatment of various plant pathogens. The method is applicable to the preparation of a variety of .beta.-nitroesters, .beta.-nitroketones, .beta.-nitronitriles and .alpha.,.beta.-dinitro compounds. Many of these .beta.-nitro compounds are novel compounds not known heretofore.
Abstract:
THE INVENTION RELATES TO A PROCESS FOR THE PRODUCTION OF NITROPARAFFINS FROM HYDROCARBONS HIGHER THAN METHANE, BY NITRATION WITH NITROGEN PEROXIDE IN THE PRESENCE OF OXYGEN, INTRODUCED IN THE FORM OF AIR, WHEREIN THE NITRATION IS CARRIED OUT AT A PRESSURE WHICH IS BETWEEN 8 AND APPROXIMATELY 14 BARS, THE REACTANT GASES BEING PREHEATED UNDER THE REACTION PRESSURE AND INTRODUCED INTO THE REACTION ZONE BETWEEN 150 AND 330*C., THE GASEOUS EFFLUENTS ORIGINATING FROM THE NITRATION ZONE BEING SUBJECTED TO A RAPID COOLING OR QUENCHING.
Abstract:
DISCLOSED IS A PROCESS FOR NITROSATING NITROSATABLE PHENOLIC MATERIAL. NITROGEN TRIOXIDE AND THE PHENOLIC MATERIAL ARE INTRODUCED SIMULTANEOUSLY AT SPECIFIC RATES INTO AN AGITATED, ACIDIC, AQUEOUS MEDIUM ESTABLIXHED AND MAINTAINED IN THE TEMPERATURE RANGE FROM ABOUT -20 TO ABOUT 20* C., AND HAVING AN INITIAL CONCENTRATION OF NITROUS ACID IN A RANGE FROM ANOUT 0 TO ABOUT 1% BY WEIGHT OF THE AQUEOUS MEDIUM. THE INITIAL PH OF THE AQUEOUS MEDIUM IS LESS THAN ABOUT 5, PREFERABLY ABOUT 1, AND COMPRISES WATER AND, DISSOLVED IN THE WATER, ACID MATERIAL SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE STRONG ACIDS LIKE NITRIC ACID AND SULFURIC ACID. THE RATE OF INTRODUCTION OF THE PHENOLIC MATERIAL INTO THE AQUEOUS MEDIUM IS PREFERABLY SUBSTANTIALLY THE RATE AT WHICH THE PHENOLIC MATERIAL IS NITROSATED IN THE AQUEOUS MEDIUM. THE RATE OF INTRODUCTION OF NITROGEN TRIOXIDE INTO THE AQUEOUS MEDIUM IS SUBSTANTIALLY AT THE RATE AT WHICH A SLIGHT STOICHIOMETRIC EXCESS, RELATIVE TO THE PHENOLIC MATERIAL BEING INTRODUCED INTO THE AQUEOUS MEDIUM OF NITROUS ACID IS ESTABLISHED AND MAINTAINED IN THE REACTION MEDIUM. AS REACTION TAKES PLACE NITROSATED PHENOLIC PRODUCT FORMS AND PRECIPITATES. PREFERABLY THE REACTION MIXTURE THAT RESULTS IS MAINTAINED WITH AGITATION IN THE TEMPERATURE RANGE UNTIL THE REACTION IS SUBSTANTIALLY COMPLETE, AND THEN THE PRECIPITATED NITROSATED PHENOLIC PRODUCT IS SEPARATED FROM THE REACTION MIXTURE.
Abstract:
The invention provides an oxidation process for converting 4nitroso-m-cresol to the corresponding 4-nitro-m-cresol by reacting the nitroso compound with an oxidizing agent in the presence of a catalyst at reflux temperatures in a reaction solvent solution including lower aliphatic and alicyclic ketones. The mixture thereafter is cooled and the 4-nitro-m-cresol is recovered from the solvent solution.