Chitosan as an eco-friendly solid base catalyst for the solvent-free synthesis of jasminaldehyde
Chitosan as an eco-friendly solid base catalyst for the solvent-free synthesis of jasminaldehyde
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DOI：
10.1016/j.molcata.2010.02.005
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发表时间：
2010-04
影响因子：
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通讯作者：
N. Sudheesh;S. Sharma;R. Shukla
中科院分区：
文献类型：
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作者：
N. Sudheesh;S. Sharma;R. Shukla
通过水凝胶合成路线对壳聚糖进行了改性，并考察了其在无溶剂条件下催化1-庚醛与苯甲醛缩合合成茉莉醛的活性。壳聚糖是茉莉醛的天然产物，也是一种无溶剂的合成方法，具有绿色催化的优点。在160℃时，茉莉醛的转化率和选择性最高，分别为99%和88%。考察了催化剂用量、反应温度和苯甲醛与正庚醛的摩尔比等反应参数对转化率和选择性的影响。该催化剂可重复使用6次，活性和选择性没有明显损失。
Chitosan was modified through the hydrogel synthesis route and its catalytic activity was evaluated for the synthesis of jasminaldehyde by the condensation of 1-heptanal with benzaldehyde under solvent-free conditions. Chitosan being natural product and also the solvent-free synthesis procedure of jasminaldehyde have the advantage of green catalysis. Maximum conversion of >99% and 88% selectivity to jasminaldehyde were obtained at 160°C. The effect of reaction parameters such as the amount of the catalyst, temperature and the benzaldehyde to 1-heptanal molar ratio on the conversion and selectivity was studied. The catalyst was recycled up to six times without significant loss in its activity and selectivity.