Jubilant Generics Limited

Chetan Balubhai Patel

Indranil Nandi

Rajendra Shekhawat

Mohan Chikmagalur Sadashivappa

Saji Thomas

Bidyut Biswas

M Umamaheshwar Prasad

Rohit Chakravarthy

Anilkumar Haribhat Lingabhat

The present invention relates to a process for the preparation of angiotensin receptor blockers or its pharmaceutically acceptable salts thereof containing less than 10 ppm of the azido impurities. More particularly, the present invention relates to process for the preparation of Losartan, Losartan potassium of Formula I or its other pharmaceutically acceptable salts thereof containing less than 10 ppm of each of the azido impurities, wherein the azido impurity is selected from the group comprising of 5-(4'-(azidomethyl)-[1,1&#x2032;-biphenyl]-2-yl)-1H-tetrazole, 4&#x2032;-(azidomethyl)-[1,1&#x2032;-biphenyl]-2-carbonitrile, 4&#x2032;-((5-(azidomethyl)-2-butyl-4-chloro-1H-imidazol-1-yl)methyl)-[1,1&#x2032;-biphenyl]-2-carbonitrile, 5-(4&#x2032;-((5-(azidomethyl)-2-butyl-4-chloro-1H-imidazol-1-yl)methyl)-[1,1&#x2032;-biphenyl]-2-yl)-1H-tetrazole, 5-(azidomethyl)-2-butyl-4-chloro-1H-imidazole, 4&#x2032;-((4-(azidomethyl)-2-butyl-5-chloro-1H-imidazol-1-yl)methyl)-[1,1&#x2032;-biphenyl]-2-carbonitrile, 5-(4&#x2032;-((4-(azidomethyl)-2-butyl-5-chloro-1H-imidazol-1-yl)methyl)-[1,1&#x2032;-biphenyl]-2-yl)-1H-tetrazole and 1-((1-((2&#x2032;-(1H-tetrazol-5-yl)-[1,1&#x2032;-biphenyl]-4-yl)methyl)-2-butyl-4-chloro-1H-imidazol-5-yl)methyl)-5-(4&#x2032;-((5-(azidomethyl)-2-butyl-4-chloro-1H-imidazol-1-yl)methyl)-[1,1&#x2032;-biphenyl]-2-yl)-1H-tetrazole. More particularly, the present invention relates to a simple, economical and industrially efficient process for the preparation of Losartan potassium of Formula I. 

Preparation of angiotensin receptor blockers or pharmaceutically acceptable salts thereof

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Mysore, India

Chetan Balubhai Patel