1) direct bromination
直接溴化法
1.
2-bromothiophene was synthesized respectively by three methods: acetic acid solvent,carbon tetrachloride solvent and direct bromination.
分别采用冰乙酸溶剂法、四氯化碳溶剂法、直接溴化法合成了2-溴噻吩,重点考察了加溴方式、加溴时间、原料配比、反应温度等影响因素对直接溴化法生产2-溴噻吩工艺的影响,并对三种生产工艺的生产成本进行了对比分析。
2) direct bromination
直接溴化作用
3) esterification
[英][e,sterifi'keiʃən] [美][ɛ,stɛrəfə'keʃən]
直接酯化法
1.
Five long-chain saturated alkanoyl-6O-D-isoascorbates(alkanoyl=decanoyl,lauroyl,myristoyl,palmitoyl and stearoyl) were synthesized by esterification(or transesterification) of D-isoascorbic acid with alkanoic acids using concentrated H_2SO_4 as a medium and a catalyst at room temperature.
用浓H2SO4作为反应介质和催化剂,通过直接酯化法或酯交换法合成了5个D-异抗坏血酸脂肪酸(癸酸,月桂酸,豆蔻酸,棕榈酸和硬脂酸)酯,其结构经1H NMR和IR表征。
4) direct fluorination
直接氟化法
1.
There are two methods for synthesis of the fluoroporphyrins: direct and indirect fluorination.
含氟卟啉合成方法分为直接氟化法和间接氟化法。
5) direct esterification
直接酯化法
1.
Pentaerythritol tetramethylacrylate is synthesized by direct esterification,and the effects on the reaction of esterification are studied.
采用直接酯化法合成了季戊四醇四甲基丙烯酸酯,通过研究影响该酯化反应的几个因素,确定了最佳反应条件:n(季戊四醇)∶n(甲基丙烯酸)=1∶8,以对甲基苯磺酸为催化剂,N,N-二环己基碳酰亚胺为脱水剂,对苯二酚为阻聚剂,它们分别占醇酸总质量的6。
2.
This paper introduces the market of ethylene glycol monoethylether acetate at home and abroad,also illustrating major production processes:direct esterification,ester interchange and one step synthesis method.
介绍了乙二醇单乙醚醋酸酯国内外市场情况和３种主要生产方法：直接酯化法、酯交换法、一步合成法。
6) direct oxidation
直接氧化法
1.
Synthesis of 2,3,5-trimethylhydroquinone by direct oxidation;
直接氧化法合成2,3,5-三甲基氢醌
2.
p-Bromobenzaldehyde was synthesized from p-bromotoluene by direct oxidation with manganese sesquioxide The factors affecting the yields of p-bromobenzaldehyde were investigated.
用三氧化二锰直接氧化法将对溴甲苯氧化对溴苯甲醛,讨论了合成过程中影响产率的各种因素,确定反应的优化条件为温度338K,硫酸的浓度7。
3.
The paper reviews the development of direct oxidation process for sulfur recovery, with the emphasis on direct oxidation processes which are more successful recently, and puts forth the necessity for developing the processes.
综述了直接氧化法硫回收技术的进展情况 ,重点介绍了目前较为成功的直接氧化法工艺技术 ,指出了开发该技术的必要性。
补充资料：溴化吡啶斯的明
分子式：
CAS号：
性质：又称溴化吡啶斯的明，美斯地浓。本品为易吸潮晶体。熔点152～154℃。溶于水和乙醇。本品为胆碱酯酶抑制剂，有兴奋平滑肌、横纹肌及抑制心血管的作用，比新斯的明的作用弱，但较持久，用于重症肌无力、手术后腹气胀和尿潴留。制剂有片剂、糖浆剂、注射剂。
CAS号：
性质：又称溴化吡啶斯的明，美斯地浓。本品为易吸潮晶体。熔点152～154℃。溶于水和乙醇。本品为胆碱酯酶抑制剂，有兴奋平滑肌、横纹肌及抑制心血管的作用，比新斯的明的作用弱，但较持久，用于重症肌无力、手术后腹气胀和尿潴留。制剂有片剂、糖浆剂、注射剂。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条