检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]黑龙江省科学院石油化学研究院,黑龙江哈尔滨150040 [2]哈尔滨理工大学化学与环境工程学院,黑龙江哈尔滨150080
出 处:《化学与粘合》2012年第2期81-83,共3页Chemistry and Adhesion
摘 要:以N,N-二甲基甲酰胺作溶剂,四丁基溴化铵作相转移催化剂,碳酸二甲酯作甲基化试剂,由四氢咔唑酮与氢氧化钾反应先合成钾盐,再经甲基化合成了N-甲基四氢咔唑酮。考察了钾盐与碳酸二甲酯的配比、反应时间、溶剂用量、催化剂及催化剂用量等因素对反应收率的影响。较佳合成条件为碳酸二甲酯∶四氢咔唑酮钾盐=2.5∶1,四丁基溴化铵用量为钾盐物质的量的2%,在100℃反应10h,反应摩尔收率可达80%以上。The intermediate, potassium salt of tetrahydro-carbazol-4-one was synthesized from tetrahydro-carbazol-4-one and KOH at first, in the presence of tetrabutyl ammonium bromide (TBAB) as the phase transfer catalyst (PTC), N,N-dimethylformamide (DMF) as the solvent, and dimethyl carbonate(DMC)as the methylating reagent. Then N-methy-l,2,3,4-tetrahydrocarbazole-g-one was prepared by methylation of the intermedi- ate. The best yield(~〉80%) of N-methy-l,2,3,4-tetrahydrocarbazole-4-one was obtained under the optimized conditions: n(DMC):n(tbe intermediate)= 2.5:1, n(TBAB)/n(potassium salt)=2% (molar ratio), the reaction temperature was 100 °C and the reaction time was 10h. The molar yield of this reac- tion could reach over 80%.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.176