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 a hydrogen bromide aqueous solution comprising about 43% to about 53% w/w of hydrogen bromide present in an amount ranging from about 1.0 molar equivalent to about 2.0 molar equivalents of the about 43% to about 53% w/w aqueous solution of hydrogen bromide to a compound of Formula (I), the acid addition salt is an HBr salt, and the salt of a compound of Formula (II) is

Provenance & Evidence