摘要:
A process for producing a 1-benzylimidazole compound represented by the following formula (I) wherein R₂ is lower alkyl or phenyl and R₄ is hydrogen or methyl which comprises (a) heating a 1-unsubstituted imidazole compound of formula (II) wherein R₂ and R₄ are as defined above, with (i) benzyl alcohol in the presence of a carboxylic acid, a carboxylic anhydride, a benzyl ester thereof or a lower alkyl ester thereof or (ii) with a benzyl ester of a carboxylic acid and (b) neutralizing the reaction product with an alkali.
摘要:
A process for producing a 1-benzylimidazole compound represented by the following formula (I) wherein R₂ is lower alkyl or phenyl and R₄ is hydrogen or methyl which comprises (a) heating a 1-unsubstituted imidazole compound of formula (II) wherein R₂ and R₄ are as defined above, with (i) benzyl alcohol in the presence of a carboxylic acid, a carboxylic anhydride, a benzyl ester thereof or a lower alkyl ester thereof or (ii) with a benzyl ester of a carboxylic acid and (b) neutralizing the reaction product with an alkali.
摘要:
A process for preparing, on an industrial scale, 4-halo-5(hydroxymethyl) imidazole compounds, shown below, that are useful as intermediates for medicines. A 4-halo-5(hydroxymethyl) imidazole compound is prepared by reacting a 4,5-bis(hydroxymethyl) imidazole compound with a halogenating agent such as an N-chlorosuccinimide, an N-bromosuccinimide or a chlorinated isocyanuric acid compound.
wherein R is a hydrogen atom, an alkyl group, an aryl group or an aralkyl group, and X is a halogen atom.