The present invention provides an improved synthesis for the manufacture of candesartan and pharmaceutically acceptable salts and esters thereof as active ingredients of a medicament for the treatment of hypertension and related diseases and conditions which comprises the removal of {HEAD ~ the tetrazolyl protecting group} in {TAIL ~ an organic solvent}, and in the presence of a Lewis acid 
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The present invention provides an improved synthesis for the manufacture of candesartan and pharmaceutically acceptable salts and esters thereof as active ingredients of a medicament for the treatment of hypertension and related diseases and conditions which comprises the removal of { HEAD ~ the tetrazolyl protecting group } in { TAIL ~ an organic solvent } , and in the presence of a Lewis acid
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