Abstract:
The present invention provides a process for the preparation of desloratadine comprising contacting loratadine with a mixture of a weak inorganic base and sodium or potassium hydroxide in a ratio, ranging from 0.01 to 0.15 equivalents of sodium or potassium hydroxide per equivalent of weak inorganic base, in one or more suitable solvents) followed by isolation.
Abstract:
The present invention relates to a process for the preparation of threo-3,4-epoxy-2-amino-1-substituted butane derivatives represented by general Formula I which comprises reacting compound of Formula III or salt thereof with an active ester of acid of Formula IV and treating the product thereof with base. The carbon atom bonded to the radical R3 in Formula I and IV is in the (R)-, (S)- or (R,S)-configuration. The compounds of Formula I and III, particularly in their (2S,3R) configuration are useful intermediates for the preparation of atazanavir bisulfate.
Abstract:
The present invention is related to processes for the preparation of faropenem, which comprises treating the compound of Formula II, with an alkali metal salt of a substituted or unsubstituted C5-10 carboxylic acid and a catalytic amount of a palladium complex in the presence of an organic solvent, followed by the treatment of the reaction mixture of with water and a water miscible solvent, and isolating a hydrate of an alkali metal salt of faropenem from the reaction mass, wherein water is not removed from the reaction mixture in water treatment or isolation steps.
Abstract:
The invention relates to crystalline barium salt of (S)-omeprazole, which is (S)-5-methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridinyl)-methyl]sulfinyl]-1H-benzimidazole. The invention also relates to processes for preparing crystalline barium salt of (S)-omeprazole and pharmaceutical compositions that include the crystalline barium salt of (S)-omeprazole so prepared.
Abstract:
The present invention relates to a process for enantioselective synthesis of substituted pyridinylmethyl sulfinyl-benzimidazole of compound of Formula (I). The process includes enantioselective catalytic oxidation of a substituted pyridinylmethyl prochiral sulfide derivative of compound of Formula (II) with an oxidizing agent in the presence of a chiral transition metal complex and a base in the absence of an organic solvent.
Abstract:
The invention relates to processes for the preparation of carbapenems. More particularly, it relates to a process for the preparation of meropenem.
Abstract:
The invention relates to processes for the preparation of piperidylmethyl-indanones, and to the use of these compounds as intermediates for the preparation of benzyl-piperidylmethyl-indanones which are active compounds for the treatment of CNS disorders. The invention also relates to a process for the preparation of donepezil or a pharmaceutically acceptable salt thereof, and pharmaceutical compositions that include the donepezil or a pharmaceutically acceptable salt thereof.
Abstract:
The invention relates to enantiomerically pure cilazapril and a process for preparing enantiomerically pure cilazapril. The invention also relates to pharmaceutical compositions that include the enantiomerically pure cilazapril and use of said compositions for treating a patient in need of an antihypertensive agent.