New regioselective synthesis of metalinked aromatic polyketones from metasubstituted bis(arylsilane)s and aromatic dicarboxylic acid chlorides
New regioselective synthesis of metalinked aromatic polyketones from metasubstituted bis(arylsilane)s and aromatic dicarboxylic acid chlorides
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DOI：
10.1002/pola.10665
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发表时间：
2003-05
期刊：
影响因子：
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通讯作者：
H. Takeuchi;M. Kakimoto;Y. Imai
中科院分区：
文献类型：
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作者：
H. Takeuchi;M. Kakimoto;Y. Imai
首次实现了金属连接芳香聚酮的区域选择性合成。以三氯化铝为催化剂，在1，2-二氯乙烷中，通过间位取代双芳基硅烷与芳香族二元酰氯的溶液缩聚反应，沿着三甲基氯硅烷的消除，区域选择性地合成了比浓对数粘度高达0.49 dL/g的新型间位连接芳香族聚酮。缩聚反应通过芳香亲电取代反应进行。金属连接的芳香族聚酮具有相当低的玻璃化转变温度和10%的重量损失温度比他们的对应物paracatenated芳香族聚酮。© 2003 Wiley Periodicals，Inc.聚合物科学杂志A部分：聚合物化学41：1428-1434，2003
A new regioselective synthesis of metalinked aromatic polyketones was achieved for the first time. New metaconnected aromatic polyketones with inherent viscosities of up to 0.49 dL/g were regioselectively synthesized by the solution polycondensation of metasubstituted bis(arylsilane)s with aromatic dicarboxylic acid chlorides in the presence of aluminum chloride in 1,2-dichloroethane along with the elimination of chlorotrimethylsilane. The polycondensation proceeded through aromatic electrophilic ipso-substitution. The metalinked aromatic polyketones had considerably lower glass-transition temperatures and 10% weight-loss temperatures than those of their counterpart paracatenated aromatic polyketones. © 2003 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 41: 1428–1434, 2003