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- Synthesis of ethyl iso nicotinate using BTEAC (benzyl triethyl ammonium chloride) as phase transfer catalyst was studied. 以 BTEAC(苄基三乙基氯化铵 )为相转移催化剂合成了异烟酸乙酯。
- The condensation compound was synthesized by 2 butene 1,4 diol and iso butyric aldehyde,and was characterized by elemental analysis and IR. 将异丁醛与1,4丁烯二醇缩合得到产物二氧七环,对产物进行了元素分析和IR分析。
- Keywords phase transfer catalysis;esterification;ethyl iso nicotinate; 相转移催化剂;酯化;异烟酸乙酯;
- 10.Synthesis of ethyl iso nicotinate using BTEAC (benzyl triethyl ammonium chloride) as phase transfer catalyst was studied. 以 BTEAC(苄基三乙基氯化铵 )为相转移催化剂合成了异烟酸乙酯。
- An ISO standard codec for computer audio and video. 它是iso标准的计算机音频、频多媒体数字信号编解码器。
- High quality service platform governed by ISO 9002. 经ISO 9002认证的优质服务平台。
- There was an error creating the ISO image. 制作ISO镜象过程中出现错误。
- To introduce the ethyl group into(a compound). 使乙基化把乙基引入（一化合物）
- Represents weeks in an ISO 8601 calendar. 表示ISO 8601日历中的周。
- The download file is an ISO CD image. 下载文件为一个ISO CD映像。
- Create a dummy file to pad out your iso if needed. 生成占位文件。
- Race towards a single ISO Certificate is on! 为取得单一份ISO证书而努力!
- And prints the ISO language name. 并打印ISO语言名称。
- Generate a Lite Touch bootable RAM disk ISO image. 选择此选项以生成可从RAM磁盘启动的ISO映像。
- Boxed text is original ISO 9001:2000 text. 带方框的内容源于iso9001 2000.
- The quality is subject to ISO 9000 or GB/T 19000. 品质按ISO9000标准或GB/T 19000标准。
- Familiar with document control, ISO quality system. 熟悉文档管理标准、体系和控制。
- We've had ISO certification for a long time. 我们早就通过iso认证了。
- Assist in Implementation of ISO,TQM,JIT,ERP etc. 协助完成ISO质量，TQM全面质量管理，JIT即时到货，ERP物料系统的管理.
- The key step in the synthesis is Wittig coupling of farnesyltriphenylphosphonium bromide (8) with ethyl 2-oxo-3-methyl butyrate (3). (3) was prepared by Grignard reaction of ethyl oxalate with iso-propylmagnesium bromide. 其中关键步骤是溴化法呢基三苯基?(8)和2-氧代-3-甲基丁酸乙酯(3)的Wittig反应。
