NOVELTY - 2-ethoxy-1-((2'-(1H-tetrazol-5-yl)biphenyl-4-yl)methyl)benzimidazole-7-carboxylate (V), triphenylchloromethane and triethylamine hydrochloride are reacted, and N-protection reaction is carried out to obtain 2-ethoxy-1-((2-(1-trityl-tetrazol-5-yl)biphenyl-4-yl)methyl)benzimidazole-7-carboxylate (VI). The compound (VI) is esterified and deprotected to obtain plus minus -2-ethoxy -1-((2'-(1H-tetrazol-5-yl)-(1,1'-biphenyl)-4-yl)methyl)-1H-benzoimidazole-7-carboxylic acid and (1-((cyclohexyl-yloxy)carbonyl)oxy)ethyl ester.    USE - Manufacture of candesartan ester (claimed).    ADVANTAGE - The candesartan ester is economically manufactured at high yield and quality without affecting environment.    DETAILED DESCRIPTION - Methyl 2-amino-3-nitrobenzoate and 4-formyl-2-biphenylcarbonitrile are added in an organic solvent, and condensed at 0-5 degrees C to obtain 2-((2'-cyanobiphenyl-4-yl)methylene amino)-3-nitrobenzoate (I). The obtained compound (I) is reacted with a reducing agent to obtain 2-((2'-cyanobiphenyl-4-yl)methyl)amino-3-aminobenzoate (II). Compound (II) and tetraethyl orthocarbonate are subjected to heating cyclization to obtain 1-((2'- cyanobiphenyl-4-yl)methyl)-2-ethoxy-1H-benzimidazole-7-carboxylate (III). The obtained compound (III) and tributyl tin azide are reacted, cyano group is converted into tetrazole, and 2-ethoxy-1-((2'-(1H-tetrazol-5-yl)biphenyl-4-yl)methyl)benzimidazole-7- carboxylate (IV) is obtained. The compound (IV) is hydrolyzed under alkaline conditions to obtain 2-ethoxy-1-((2'-(1H-tetrazol-5-yl)biphenyl-4-yl)methyl)benzimidazole-7-carboxylate (V). The compound (V), triphenylchloromethane and triethylamine hydrochloride are reacted, and N-protection reaction is carried out to obtain 2-ethoxy-1 -((2-(1-trityl-tetrazol-5-yl)biphenyl-4-yl)methyl)benzimidazole-7-carboxylate (VI). The compound (VI) is esterified to obtain 2-ethoxy-1-((2-(1-trityl-tetrazol-5-yl)biphenyl-4-yl)methyl)benzimidazole-7-carboxylic acid (VII) and (1-((cyclohexyl-yloxy)carbonyl)oxy)ethyl ester. The compound (VII) is deprotected to obtain plus minus -2-ethoxy -1-((2'-(1H-tetrazol-5-yl)-(1,1'-biphenyl)-4-yl)methyl)-1H-benzoimidazole-7-carboxylic acid and 1-((cyclohexyl-yloxy)carbonyloxy)ethyl ester (candesartan cilexetil).