n-butyllithium; tri-isopropoxy-borane in tetrahydrofuran T=-30 - 20°C; 1.75 h;

1: 5-phenyl-1-trityl-1H-tetrazole With n-butyllithium in tetrahydrofuran; hexane T=-25 - -5°C; 3.75 h; 2: tri-isopropoxy-borane in tetrahydrofuran; hexane T=-25 - 35°C; 2 h; 3: With water; acetic acid in tetrahydrofuran; hexane T=0 - 5°C; 1 - 1.33333 h; Product distribution / selectivity;

1: 5-phenyl-1-trityl-1H-tetrazole With n-butyllithium in tetrahydrofuran T=-20 - -5°C; 1 h; 2: boric acid trimethyl ester in tetrahydrofuran T=-25 - 20°C; 0.5 h; 3: With water in tetrahydrofuran

1: 5-phenyl-1-trityl-1H-tetrazole With n-butyllithium in tetrahydrofuran; hexane T=25°C; Negishi coupling reaction; 1 h; Inert atmosphere; 2: With zinc(II) chloride in tetrahydrofuran; hexane T=-20°C; Negishi coupling reaction; 0.5 h; Inert atmosphere; 3: methyl N-(4-bromobenzyl)-N-pentanoyl-L-valinate With (1,2,3,4,5-pentaphenylferrocen-1'-yl)-di-tert-butylphosphine; palladium diacetate in tetrahydrofuran; hexane T=25 - 75°C; Negishi coupling reaction; 2 h; Inert atmosphere;