[C:1]([C:5]1[CH:6]=[C:7]([CH:15]=[C:16]([C:19]([CH3:22])([CH3:21])[CH3:20])[C:17]=1[OH:18])[O:8][CH2:9][CH2:10][CH2:11][CH2:12][C:13]#[N:14])([CH3:4])([CH3:3])[CH3:2].[Cl-].C([NH+](CC)CC)C.[N-:31]=[N+:32]=[N-:33].[Na+].Cl>O.CN1CCCC1=O>[C:1]([C:5]1[CH:6]=[C:7]([CH:15]=[C:16]([C:19]([CH3:22])([CH3:21])[CH3:20])[C:17]=1[OH:18])[O:8][CH2:9][CH2:10][CH2:11][CH2:12][C:13]1[NH:33][N:32]=[N:31][N:14]=1)([CH3:4])([CH3:3])[CH3:2]
Under a nitrogen atmosphere, a mixture of 7.00 g (0.023 mole) of 5-(3,5-di-t-butyl-4-hydroxyphenoxy)-valeronitrile, 4.73 g (0.034 mole) of triethylammonium chloride, 4,47 g (0.069 mole) of sodium azide and 200 ml of 1-methylpyrrolidone was heated at 150° C. for about 60 hours. The reaction mixture was cooled and then poured into 200 ml of water. The aqueous mixture was acidified to pH 1 with 10% hydrochloric acid and then extracted five times with 100 ml portions of diethyl ether. The diethyl ether extracts were combined, washed with brine, dried over magnesium sulfate and evaporated to provide an oil. The oil was purified by silica gel chromatography eluting with 2:1 hexane:acetone containing 3 ml of acetic acid per 1600 ml of solvent followed by recrystallization of the isolated material from a mixture of ethyl acetate and hexane to provide 3.3 g of 5-[4-(3,5-di-t-butyl-4-hydroxyphenoxy)butyl]tetrazole as a white solid, m.p. 141°-141.5° C. Analysis: Calculated for C19H30N4O2 : %C, 65.9; %H, 8.7; %N, 16.2; Found: %C, 65.7; %H, 8.6; %N, 16.2.
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