METAL SALTS OF 2 ' - ( 1H-TETRAZ0L-5-YL) -1 . 1 ' -BIPHENYL-4-CARBOXALDEHYDE

摘要

The invention relates to a method or process for the manufacture of blood pressure lowering agents, such as valsartan, novel intermediates as well as process steps in said synthesis. The method or process leads via the novel intermediate salts of the formula (IA), or a tautomer thereof, wherein [Kat]<SUP>n+</SUP> is a cation and n is 1, 2, 3, 4, 5 or 6.