A Potential New RAFT - Click Reaction or a Cautionary Note on the Use of Diazomethane to Methylate RAFT-synthesized Polymers
作者:Ming Chen、Graeme Moad、Ezio Rizzardo
DOI:10.1071/ch10471
日期:——
end‐groups underwent similar reaction as indicated by immediate decolourization and a quantitative doubling of molecular weight. Higher‐molecular‐weight poly(methyl methacrylate)s were also rapidly decolourized by diazomethane and provided a product with a bimodal molecular weight distribution. Under similar conditions, the trithiocarbonate group does not react with diazomethane.
已经发现,重氮甲烷与二硫代苯甲酸酯RAFT试剂和由RAFT聚合形成的聚合物的二硫代苯甲酸酯端基都容易进行1,3-偶极环加成。因此,室温下用重氮甲烷处理的2-氰基丙-2-基二硫代苯甲酸酯提供了接近定量(> 95%)的立体异构体1,3-二硫代戊烷混合物。低分子量RAFT合成的带有二硫代苯甲酸酯端基的聚(甲基丙烯酸甲酯)经历了相似的反应,如立即脱色和分子量定量翻倍所示。高分子量的聚甲基丙烯酸甲酯也被重氮甲烷快速脱色,并提供了具有双峰分子量分布的产品。在类似条件下,三硫代碳酸酯基团不与重氮甲烷反应。