CAJ | 학술논문

以短链α-烯烃为原料制备了高纯度的、结构明确的具有双烷基结构的α-烯烃,并研究双烷基α-烯烃与HBr加成制备1-溴代烷烃的反应.考察了反应温度、反应时间、溶剂类型和过氧化物对α-烯烃的转化率和1-溴代烷烃选择性的影响.结果表明,在-6～75℃范围,温度对α-烯烃的转化率没有明显的影响,但1-溴代烷烃的选择性随温度的降低而升高;溶剂对1-溴代烷烃的选择性也产生显著的影响,非极性溶剂有利于1-溴代烷烃选择性的提高;双烷基α-烯烃与HBr进行加成反应过程中发生了重排反应,生成了既不同于马式加成也不同于反马式加成产物的新化合物.
이단련α-희경위원료제비료고순도적、결구명학적구유쌍완기결구적α-희경,병연구쌍완기α-희경여HBr가성제비1-추대완경적반응.고찰료반응온도、반응시간、용제류형화과양화물대α-희경적전화솔화1-추대완경선택성적영향.결과표명,재-6～75℃범위,온도대α-희경적전화솔몰유명현적영향,단1-추대완경적선택성수온도적강저이승고;용제대1-추대완경적선택성야산생현저적영향,비겁성용제유리우1-추대완경선택성적제고;쌍완기α-희경여HBr진행가성반응과정중발생료중배반응,생성료기불동우마식가성야불동우반마식가성산물적신화합물.
A di-substituted α-olefin with high purity and definitive structure was prepared by short chain α-olefin as starting material, and the preparation of 1-bromo-hydrocarbon through the reaction of di-substituted α-olefin with gaseous hydrogen bromide was carried out. The effects of reaction variables, such as solution type, reaction temperature and initiator, upon conversion of α-olefin and the selectivity of 1-bromo-hydrocarbon were investigated. The results indicated that at reaction temperature in the range of -6-75℃, the conversion of α-olefin was not affected by the temperature while the selectivity of 1-bromo-hydrocarbon was markedly affected, which increased with the temperature decreasing. The solution type also had significant effect on the selectivity of 1-bromo-hydrocarbon, the no polar solution was favorable for the selectivity. It was found that a new compound, neither the product of Markovnikon addition nor the product of anti-Markovnikov addition, was produced by rearrangement reaction occurred during the addition reaction of di-substituted a-olefin with gaseous hydrogen bromide.