The present invention provides an improved synthesis for {HEAD ~ the manufacture} of candesartan and {TAIL ~ 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 the tetrazolyl protecting group in an organic solvent, and in the presence of a Lewis acid 
of
The present invention provides an improved synthesis for { HEAD ~ the manufacture } of candesartan and { TAIL ~ 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 the tetrazolyl protecting group in an organic solvent , and in the presence of a Lewis acid
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