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Dharmaraj Ramachandra Rao, Thane (w) IN

Dharmaraj Ramachandra Rao, Thane (w) IN

Patent application numberDescriptionPublished
20100094004Process for Preparation of Erlotinib and its Pharmaceutically Acceptable Salts - A process for the preparation of a salt of N-(3-ethynylphenyl)-6,7-bis(2-methoxyethoxy)quinazolin-4-amine comprising reacting a 4˜halo-6,7-bis(2-methoxyethoxy) quinazoline with 3-aminophenyl acetylene or an acid salt thereof under acidic conditions to form the corresponding acid salt of N-(3-ethynylphenyl)-6,7-bis(2-methoxyethoxy)quinazolin-4-amine, the process optionally further comprising converting the acid salt of N-(3-ethynylphenyl)-6,7-bis(2-methoxyethoxy)quinazolin-4-amine to N-(3-ethynylphenyl)-6,7-bis(2-methoxyethoxy)quinazolin-4-amine.04-15-2010
20100137586Process for the Preparation of Gefitinib - There is provided a compound of formula (III), and a process for preparing a compound of formula (V) comprising converting a compound of formula (III) to the compound (V), wherein (X) is fluoro, chloro, bromo or iodo. There is also provided a process for preparing a compound of formula (XI) comprising converting a compound of formula (X) to the compound (XI). The compounds (V) and (XI) so prepared may be used in a process for preparing gefitinib.06-03-2010
20100222572PROCESSES FOR THE PREPARATION OF CICLESONIDE AND ITS CRYSTAL MODIFICATION - Improved processes for the synthesis of ciclesonide, chemically termed as [11β,16α(R)]-16,17-[(cyclohexylmethylene)bis(oxy)]-11-hydroxy-21-(2-methyl-1-oxopropoxy)pregna-1,4-diene-3,20-dione and its crystal modification.09-02-2010
20100298565Processes for the Preparation of Paliperidone and Pharmaceutically Acceptable Salts Thereof and Intermediates for Use in the Processes - The present invention relates to novel compounds of formula (VIII) and (X), processes for their preparation and their use in the preparation of paliperidone or a salt thereof. There is also provided by the present invention novel processes for preparing intermediates for use in the preparation of paliperidone or a salt thereof, and novel processes for preparing paliperidone or a salt thereof.11-25-2010
20110009450Crystalline form of benzothiophene compound and process for preparation thereof - Crystalline raloxifene hydrochloride in hydrated form, particularly the monohydrate, processes for its preparation, pharmaceutical compositions comprising it and uses thereof.01-13-2011
20110034477Crystalline Polymorph of Doxazosin Mesylate (Form IV) and Process for Preparation Thereof - Crystalline Form IV of doxazosin mesylate, a process for its preparation and uses thereof.02-10-2011
20110077271Process for the Preparation of Donepezil Hydrochloride - The present invention provides a process for preparing donepezil or a salt thereof, the process comprising reducing a 1-benzyl-4-[(5,6-dimethoxy-1-indanon-2-yl)methylene]pyridonium halide of formula II, wherein X is bromide or chloride, in the presence of an ionic compound, a solvent, a catalyst and a source of hydrogen, to form donepezil and optionally converting the donepezil to the salt thereof.03-31-2011
20110105763Process for Preparing Valsartan - An N-[(2′-(1-triphenyl methyl tetrazole-5-yl)biphenyl]-4-yl]methyl]-L-valine benzyl ester organic salt of formula (IVA) wherein A represents an organic carboxylic acid, a process for its preparation and its use in the synthesis of valsartan or salts thereof.05-05-2011