Citation: Ming-qiang Li, Zhao-hui Tang, Chao Wang, Yu Zhang, Hai-tao Cui, Xue-si Chen. Efficient Side-chain Modification of Dextran via Base-catalyzed Epoxide Ring-opening and Thiol-ene Click Chemistry in Aqueous Media[J]. Chinese Journal of Polymer Science, ;2014, 32(8): 969-974. doi: 10.1007/s10118-014-1489-7
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In this study, a novel approach by combining base-catalyzed epoxide ring-opening and thiol-ene click chemistry is presented for the side-chain modification of dextran. The vinyl-modified dextran is prepared by a basic epoxide ring opening reaction of allyl glycidyl ether in 0.1 mol/L NaOH, followed by thiol-addition click reaction of three model sulfhydryl compounds using water-soluble Irgacure 2959 as the photoinitiator, leading to side-chain functionalized dextran modified with carboxyl, bidentate dicarboxyl or amino groups. This is the first example of combining epoxide ring-opening and thiol-ene click chemistry for side-chain modification of dextran in aqueous media. Importantly, it may also be extended as a convenient and efficient method for the side-chain modification of other polysaccharides.
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