Study on determination of Propylbromide in the air of workplace by gas-chromatography;
车间空气中丙基溴的气相色谱法测定方法研究
of Sn, and THF/H2O, allylation of aromatic aldehydes with allyl bromide was carried out smoothly in good yields, whereas aromatic ketone and aliphatic aldehyde re- acted with allyl bromide, respectively, to afford the corresponding products in low yields.
的锡存在下,以THF/H2O为反应介质,芳香醛化合物与烯丙基溴可以顺利地发生烯丙基化反应得到较高的产率,而芳香酮化合物和脂肪醛等与烯丙基溴反应只得到较低的产率。
S-Allyl-iso-thiourea bromide could be synthesized by the reaction of allyl bromide with thiourea in aqueous solution of tetrabutyl ammonium bromide.
研究了以烯丙基溴和硫脲为原料 ,在相转移催化剂四丁基溴化铵的作用下 ,以水作溶剂 ,制得S 烯丙基异硫脲盐 ,并在氢氧化钠水溶液中水解 ,酸化 ,制得了重要的含硫香料烯丙硫醇。
6 mL allyl bromide was added to a solution of sodium disulfide at 20 ℃ in half an hour and then the mixture was refluxed for 1 h.
用四丁基溴化铵做相转移催化剂 ,2 0℃下 ,在 0 5h内将 17 6mL烯丙基溴滴加到二硫化二钠溶液中 ,然后回流反应 1h ,合成了二烯丙基二硫 ,产率达到 87 7% (二烯丙基二硫的质量分数为 97 2 % ) ,并且对其结构进行了红外光谱和核磁共振分析。
In water and organism solvent heterogeneous system,2,6-di-tert-butyl-4-allyl phenol is directly prepared by 2,6-di-tert-butyl phenol and allyl bromine with catalysis of the phase transfer catalyst.
在水和有机溶剂的非均相体系中,在相转移催化剂的催化作用下,2,6 二叔丁基苯酚与烯丙基溴反应一步制备标题化合物,收率可达80%以上。
It was obtained through amination and acylation from allyl bromine in 56.
本文对有机中间体N,N′-二烯丙基脲的合成进行研究,采用烯丙基溴为原料,通过氨解和酰化两步反应得到产物,两步反应总收率56 7%。