Abstract:
Disclosed is a process for the synthesis of mono- and bis-nitrosylated propanediols, as well as compositions and pharmaceutical formulations that includes the compounds. The process proceeds by reacting a corresponding propanediol that is not nitrosylated with a source of nitrite, optionally in the presence of a suitable acid. When the source of nitrite is an organic nitrite, reacting step is performed in a suitable organic solvent, and when the source of nitrite is an inorganic nitrite, the reacting step is performed in a bi-phasic solvent mixture comprising an aqueous phase and a non-aqueous phase. Also disclosed are methods of treating a condition wherein administration of nitric oxide (NO) has a beneficial effect by administering said compounds, compositions or formulations.
Abstract:
The present disclosure relates to devices and methods for the preparation of amyl nitrite formulations at a point of use location from relatively shelf-stable reagents employing acidic cationic exchange resins.
Abstract:
Nitric esters with pharmacological activity having general formula (I), their pharmaceutical utilisation and process for their preparation. ##STR1##
Abstract:
The invention provides a process for the production of C.sub.1 to C.sub.5 alkyl nitrite by forming an aqueous solution of C.sub.1 to C.sub.5 alkyl alcohol an alkali metal nitrite; cooling it; then slowly adding a hydrohalic acid solution while it is stirring; the reaction temperature is maintained in the range of from about -10.degree. C. to about 10.degree. C. until the reaction is substantially complete; and the two formed phases are separated in a separatory funnel.
Abstract:
A process and reaction vessel for producing alkyl nitrite is disclosed the process comprising (a) contacting nitric oxide, lower alcohol and oxygen in a reaction zone such that alkyl nitrite is formed, said reaction zone comprising a reactor section and a rectification section, (b) supplying a liquid scrubbing agent to an upper portion of the rectification section, (c) withdrawing a gaseous alkyl nitrite product stream from the upper portion of the rectification section, and (d) withdrawing a liquid stream from a lower portion of the reactor section. The reactor section provides intimate vapor-liquid contact sufficient to enhance the conversion of nitric oxide to alkyl nitrite and the rectification section provides sufficient vapor residence time to enhance conversion of oxygen, as well as sufficient rectification capabilities to reduce the amounts of water and nitric acid in the gaseous alkyl nitrite product stream.
Abstract:
A process is disclosed for preparing a diester of oxalic acid by contacting carbon monoxide and an ester of nitrous acid in the vapor state under a pressure in the presence of a supported palladium monolith catalyst.
Abstract:
REACTION PRODUCTS OF NITROUS ACID AND 1.3-DICHLOROBUTENE-2 OR DISOBUTYLENE, USEFUL AS INHIBITORS OF "POPCORN" POLYMER FORMATION IN CHLOROPRENE POLYMERIZATION REACTIONS, ARE MADE BY A CONTROLLABLE PROCESS COMPRISING (1) ADDING AN ALKALI OR ALKALINE EARTH METAL NITRITE TO LIQUID 1,3-DICHLOROBUTENE-2 OR DIISOBUTYLENE WITH AGITATION, (2) SLOWLY ADDING CONCENTRATED HYDROCHLORIC OR SULFURIC ACID TO THE MIXTURE SO OBTAINED, AND (3) RECOVERING A REACTION PRODUCT OF NITROUS ACID AND 1,3-DICHLOROBUTENE2 OR DIISOBUTYLENE FROM THE BY-PRODUCT ALKALI OR ALKALINE EARTH METAL SALT FORMED.