二溴乙烷

目的：探讨工作场所空气中1,2-二溴乙烷的采样和测定方法。

Objective : to study the sampling and determinating method of ethylene dibromide among the workplace air .

对添加了四乙基铅以及扫气剂（二氯乙烷及二溴乙烷）的甲苯对非贵金属燃烧催化剂的中毒情况进行了考察。

The poisoning effects of tetraethyllead (ⅰ) and lead scavengers ( ethylene dichloride and ethylene dibromide ) on monolithic non-noble metal catalysts have been examined .

以氟化钾浸渍的氧化铝为强碱，在固液相转移催化条件下，由活泼亚甲基化合物（1a～1d）与1，2－二溴乙烷合成了4种活性环丙烷化合物2a～2d，并探讨了其反应机理。

Four active cyclopropane compounds 2a - 2d were synthesized using active methylene ( 1a - 1d ) and 1 , 2-dibromoethane with potassium fluoride soaking alumina as a strong base under the condition of solid-liquid phase transfer catalysis , and the reaction mechanism was discussed in this paper .

以对苯二酚为原料，经单苄基保护后，依次和1,2-二溴乙烷及哌啶进行缩合反应，缩合产物经脱苄基得到阿佐昔芬的另一中间体4-[2-（1-哌啶基）乙氧基]苯酚。

Hydroquinone was performed via single-benzyl protection , condensation with 1 , 2-dibromethane and piperidine in turn and hydrogenation-deprotection to provide the intermediate 4 - [ 2 - ( 1-piperidinyl ) ethoxy ] phenol .

7种新型二醚类化合物（4种乙二醇二芳基醚和3种丙二醇二芳基醚）是分别用相应的酚类化合物和1,2-二溴乙烷或1,2-二溴丙烷，经碱催化合成的。

Seven novel di-ethers ( 4 ethylene diaryl ehers and 3 trimethylene diaryl ethers ) are synthesized by reactions between phenols and either 1,2-dibromoethane or 1,3-dibromopropane , using NaOH ( 50 % ) as the catalyst .