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 {HEAD ~ the removal} of {TAIL ~ the tetrazolyl protecting group} in an organic solvent, and in the presence of a Lewis acid 
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 { HEAD ~ the removal } of { TAIL ~ the tetrazolyl protecting group } in an organic solvent , and in the presence of a Lewis acid
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