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在溶液中进行Wittig反应,产生的三苯氧膦副产物往往较难从烯烃产物中分离出去,而应用聚合物Wittig试剂,三苯氧膦即留在高分子上,通过过滤就可分离出产物,而聚合物试剂经过还原仍可重复使用. 对于聚合物支持体Wittig试剂,国外已有不少报道,所合成烯烃的产率随反应条件不同有所不同. 用相转移方法,活泼的苄基或烯丙基季鏻盐可获得高产率的烯烃;用液相Wittig试剂与高分子支持体支载的醛进行Wittig反应也有报道.本文报道用ω-溴代十一
Wittig reaction in solution, the resulting triclopoxazine by-product is often more difficult to separate from the olefin product, and the use of polymer Wittig reagent, that is, left in the polymer, the product can be isolated by filtration , While the polymer reagent can be reused after reduction.For the polymer support Wittig reagent, there are many foreign reports, the yield of the synthesized olefin varies with the reaction conditions.Using phase transfer method, lively benzyl Or allyl quaternary phosphonium salt can be obtained in high yields of olefins; liquid Wittig reagents and polymer support carried aldehyde Wittig reaction was also reported here reported using ω-bromo-eleven