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
作 者:朱园园[1,2] 古双喜[1,2] 段婷[1] 巨修练[1,2]
机构地区:[1]武汉工程大学化工与制药学院,湖北武汉430073 [2]湖北省新型反应器与绿色化学工艺重点实验室,湖北武汉430073
出 处:《精细化工》2014年第1期110-112,116,共4页Fine Chemicals
基 金:湖北省新型反应器和绿色化学工艺重点实验室开放基金(RGCT201201);武汉工程大学科学研究基金(10128301)~~
摘 要:以2-萘酚(Ⅱ)为原料,经一锅两步反应制备6-溴-2-萘酚(Ⅳ),收率为89.0%;然后经氰化反应制备6-氰基-2-萘酚(Ⅴ),投料比n(CuCN)∶n(Ⅳ)=1.5∶1时收率为91.2%;最后分别用溴素和N-溴代丁二酰亚胺(NBS)两种不同的溴化试剂制备了1-溴-6-氰基-2-萘酚(Ⅰ)。以溴素为溴化试剂,乙酸为溶剂,n(Br2)∶n(Ⅴ)=1∶1,Ⅰ的收率为89.8%;该法成本较低,适合工业上大规模生产。以NBS为溴化试剂,乙腈为溶剂,n(NBS)∶n(Ⅴ)=1.00∶1.03,收率几乎定量(99.2%);该法条件温和,简单高效,可避免溴素易挥发和吸入毒性大的缺点,更适合实验室小规模合成。6-Bromo-2-naphthol ( Ⅳ ) was prepared from 2-naphthol( Ⅱ ) via a two-step one-pot process in a yield of 89.0% ;then,6-cyano-2-naphthol( V ) was synthesized from IV under the feeding ratio of n(CuCN) :n(IV) = 1.5:1 in a yield of 91.2%. In the end, the bromination reagents Br2 and NBS were both adopted to prepare 1-bromo-6-cyano-2-naphthol ( I ) from V. In the case of Br2 as bromination reagent, acetic acid as solvent, n (Br2 ):n ( V ) = 1:1, the yield was 89. 8% ;this process is low-cost and suitable for industrialization. In the case of NBS as bromination reagent, aeetonitrile as solvent, n (NBS) : n ( V ) = 1.00:1.03, the yield is 99.2% ; this method is mild, simple, efficient for laboratory-scale preparation,in which the problems of volatilization and high inhalation toxicity of Br2 can be avoided.
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:216.73.216.28