摘要:
Disclosed herein are acyclic thiol prodrugs, and pharmaceutical compositions thereof. The prodrugs and pharmaceutical compositions thereof may be used to treat or prevent medical disorders such as, for example cystinosis, cystinuria, cancer neurodegenerative disease, Parkinson's disease, Huntington's disease, malaria, nonalcoholic fatty liver disease, radiation poisoning, arsenic poisoning, radioprotection, Wilson's disease or rheumatoid arthritis.
摘要:
The present invention relates to a process for preparation of Echothiophate Iodide (I). Echothiophate Iodide (I) obtained by the process of the present invention is obtained as new crystalline form designated as Form-SET. The process for preparation of Echothiophate Iodide (I) according to present invention is an ecofriendly process that avoids the use of hazardous solvent systems and provides Echothiophate Iodide (I) of high purity. Pharmaceutical composition of the said crystalline Form-SET of Echothiophate Iodide (I) of high purity is useful in the treatment of ocular disorders like Glaucoma.
摘要:
The present invention relates to a process for preparation of Echothiophate Iodide (I). Echothiophate Iodide (I) obtained by the process of the present invention is obtained as new crystalline form designated as Form-SET. The process for preparation of Echothiophate Iodide (I) according to present invention is an ecofriendly process that avoids the use of hazardous solvent systems and provides Echothiophate Iodide (I) of high purity. Pharmaceutical composition of the said crystalline Form-SET of Echothiophate Iodide (I) of high purity is useful in the treatment of ocular disorders like Glaucoma.
摘要:
In the preparation of trialkyl trithiophosphites by the reaction of phosphorus trihalide with alkyl mercaptan, the addition of a few parts per million of water increases the reaction rate and ultimate yield of desired trialkyl trithiophosphite.
摘要:
REACTING TRIMETHYLPOSPHITE OR ORGANO-PHOSPHONOUS ACID O,O-DIMETHYL ESTER WITH HYDROGEN SULFIDE IN THE PRESENCE OF A WEAK ORGANIC BASE (THE PKA OF WHICH IN AQUEOUS SOLUTION IS ABOT 0.5-8) AT A TEMPERATURE OF SUBSTANTIALLY BETWEEN ABOUT 0-70*C. AND A STARTING PRESSURE OF SUBSTANTIALLY BETWEEN ABOUT 1-65 ATMOSPHERES ABSOLUTE, TO FORM IN HIGH YIELD AND PURITY THE CORRESPONDING KNOWN DIMETHYL-THIOPHOSPHITE OR ORGANO-THIOPHOSPHONOUS ACIDO-MONO METHYL ESTER, WHICH ARE KNOWN INTERMEDIATES USEABLE FOR THE SYNTHESIS OF KNOWN BIOCIDAL, ESPECIALLY INSECTICIDAL, PHOSPHORIC ACID ESTERS.
摘要:
A mixture of the zinc salts of O,O-dialkyldithiophosphoric acids prepared by contacting a feedstock comprising a mixture of one or more C.sub.1 to C.sub.30 primary alcohol(s) and one or more C.sub.4 to C.sub.20 secondary alcohol(s) with P.sub.2 S.sub.5 to form a mixture of O,O'-dialkyldithiophosphoric acids and thereafter neutralizing the mixture of acids by contact with zinc oxide, the secondary alcohol(s) forming not less than 25 mol.% of the feedstock mixture.
摘要:
The manufacture of trialkyltrithiophosphites by reacting an excess of an alkyl mercaptan with phosphorous trihalide and scrubbing of noncondensible reactor off-gases with strong caustic solution, continuing the scrubbing until the strong caustic solution becomes spent though still mildly alkaline when the alkyl mercaptan separates into a separate phase. The mercaptans are separated to recycle. The trialkyltrithiophosphite can be oxidized to trialkyltriphosphorothioate with further stripping and recovery of remaining mercaptans.