摘要
以3-(3,4-二甲氧基苯基)-4-硝基丁酸甲酯(4),氨水和甲醛为原料,异丙醇溶液为溶剂,经曼尼希-酯胺解偶联反应合成了新化合物4-(3,4-二甲氧基苯基)-5-硝基哌啶-2-酮,其结构经1H NMR,13C NMR和EI-MS表征。在最佳反应条件{4 1.0 mmol,n(4)∶n(27%氨水)∶n(37%甲醛)=1.00∶1.30∶1.05,异丙醇[V(异丙醇)∶V(水)=5∶1]7.5 m L,于100℃反应12 h}下,收率74.1%。
A drug intermediate, 4-(3,4-dimethoxyphenyl) -5-nitropiperidin-2-one ( 5 ), was synthesized by Mannich coupling reaction of methyl 3- ( 3,4-dimethoxyphenyl) -4-nitrobutanoate ( 4 ), ammonia and formaldehyde, using isopropyl alcohol as the solvent. The structure was characterized by 1H NMR, 13C NMR and EI-MS. The yield of 5 was 74.1% under the optimum reaction conditions 14 1.0 mmol, n(4) : n(27% ammonia) : n(37% formaldehyde) = 1.00 : 1.30 : 1.05, PriOn [ V(Pri): V(H20) =5 : 117.5 mE, at 100 ℃ for 12 ht.
出处
《合成化学》
CAS
CSCD
2015年第7期640-642,共3页
Chinese Journal of Synthetic Chemistry
基金
中南大学研究生科研创新项目(2013zzts295)
关键词
2-哌啶酮
药物中间体
合成
条件优化
2-piperidinone
drug intermediate
synthesis
condition optimization