Potassium tert-butoxide → HCID 178420344, compound

Participants

Reaction Steps

In another aspect, a process is described for preparing a compound, or a salt of a compound, or a solvate thereof, of Formula (III). The process comprises steps of: (a) condensing benzylamine with cyclohex-3-enecarbaldehyde to form (E)-N-(cyclohex-3-en-1-ylmethylene)-1-phenylmethanamine; (b) contacting (E)-N-(cyclohex-3-en-1-ylmethylene)-1-phenylmethanamine with potassium tert-butoxide present in an amount ranging from about 0.05 molar equivalents to about 0.2 molar equivalents of potassium tert-butoxide to (E)-N-(cyclohex-3-en-1-ylmethylene)-1-phenylmethanamine to form (E)-N-benzylidene-1-(cyclohex-3-en-1-yl)methanamine; (c) contacting (E)-N-benzylidene-1-(cyclohex-3-en-1-yl)methanamine with paraformaldehyde present in an amount ranging from about 2.0 molar equivalents to about 5.0 molar equivalents of paraformaldehyde to (E)-N-benzylidene-1-(cyclohex-3-en-1-yl)methanamine, in presence of formic acid and a reaction medium comprising water present in an amount ranging from about 0.1% to about 6.5% of the reaction medium to form a compound of Formula (I); (d) contacting a compound of Formula (I) with an a hydrogen bromide solution and where the inorganic salt of a compound of Formula (II) is an acid addition salt; (e) contacting aminothiourea and benzoic acid in presence of polyphosphoric acid to form a 2-amino-5-phenyl-1,3,4-thiadiazole H3PO4 salt; (f) contacting 2-amino-5-phenyl-1,3,4-thiadiazole H3PO4 salt, CuBr2 and iso-amyl nitrite, in presence of acetonitrile, to form 2-bromo-5-phenyl-1,3,4-thiadiazole; and (g) contacting a compound of Formula (II) with 2-bromo-5-phenyl-1,3,4-thiadiazole, in presence of a sodium bis(trimethylsilyl)amide and a polar aprotic solvent, to form a reaction mixture, and optionally contacting the reaction mixture with citric acid. In another aspect, the reaction mixture comprises

Provenance & Evidence