[EN] PROCESSES FOR PRODUCING 4-BROMO-2-METHOXYBENZALDEHYDE<br/>[FR] PROCÉDÉS POUR PRODUIRE DU 4-BROMO-2-MÉTHOXYBENZALDÉHYDE
申请人:ALBEMARLE CORP
公开号:WO2012009173A1
公开(公告)日:2012-01-19
A new synthesis of 4-bromo-2-methoxybenzaldehyde is reported from 1, 4 dibromo 2- fluorobenzene. First, 2-fluoro-4-bromobenzaldehyde is prepared through metal halogen exchange and formylation with a formyl source at 0 °C. After crystallization, this intermediate is reacted with methanol in the presence of potassium carbonate. Subsequently, 4-bromo-2-methoxybenzaldehyde is crystallized.
报道了一种从1,4-二溴-2-氟苯合成4-溴-2-甲氧基苯甲醛的新方法。首先,通过金属卤素交换和甲酰源的甲酰化反应在0°C下制备2-氟-4-溴苯甲醛。在结晶后,这个中间体在存在碳酸钾的情况下与甲醇反应。随后,4-溴-2-甲氧基苯甲醛被结晶出来。