NOVELTY - Improved process of preparing prasugrel and its hydrochloride salt, comprises: (a) reacting 2-fluorophenyl acetic acid and e.g. methylcyclopropane carboxylate to obtain 1-cyclopropyl-2-(2-fluoro-phenyl)-ethanone (I); (b) brominating (I) to obtain 2-fluoro- alpha -cyclopropylcarbonylbenzyl bromide (II); (c) reacting (II) with 2-(tert-butyl-dimethyl-silanyloxy)-4,5,6,7-tetrahydro-thieno(3,2-c)pyridine (III) to provide 2-(tert-butyldimethylsilyloxy)-5( alpha -cyclopropylcarbonyl-2-fluoro-benzyl)-4,5,6,7-tetrahydrothieno-(3,2,-c)-pyridine (IV); and (d) acetylating (IV) with acetylating agent.    USE - The process is useful for preparing the prasugrel and its hydrochloride salt.    ADVANTAGE - The process: is an improved one and avoids chromatographic techniques which are not commercial viable for bulk drug industries, and reduces the time cycle for each batch run, hence the process is simple, highly economical and eco-friendly; provides highly pure advanced prasugrel intermediates and prasugrel free base with high yield; and avoids the use of class I solvents including carbon tetrachloride.    DETAILED DESCRIPTION - Improved process of preparing prasugrel and its hydrochloride salt, comprises: (a) reacting 2-fluorophenyl acetic acid and methylcyclopropane carboxylate or ethylcyclopropane carboxylate in the presence of isopropyl magnesium bromide and solvent to obtain 1-cyclopropyl-2-(2-fluoro-phenyl)-ethanone (I); (b) brominating (I) in the presence of N-bromo succinamide and benzoyl peroxide in an organic solvent to obtain 2-fluoro- alpha -cyclopropylcarbonylbenzyl bromide (II); (c) reacting (II) with 2-(tert-butyl-dimethyl-silanyloxy)-4,5,6,7-tetrahydro-thieno(3,2-c)pyridine (III) in the presence of organic base and solvent to provide 2-(tert-butyldimethylsilyloxy)-5( alpha -cyclopropylcarbonyl-2-fluoro-benzyl)-4,5,6,7-tetrahydrothieno-(3,2,-c)-pyridine (IV); and (d) acetylating (IV) with a acetylating agent in the presence of an organic base and solvent to provide prasugrel.