Citation:
LI Yi-Qun, ZHOU Mei-Yun, XU Xin-Ming, OU Yi-Qun. Carboxymethyl Cellulose Supported Triethylenetetramine as a Catalyst for Knoevenagel Condensation[J]. Chinese Journal of Applied Chemistry,
;2003, 20(1): 89-91.
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The Knoevenagel reaction of aromatic aldehydes with malononitrile and ethyl cyanoacetate proceeds smoothly in the presence of carboxymethyl cellulose supported triethylenetetramine as catalyst in the 95% ethanol to afford the desired E-isomers of the corresponding alkenes in yield of 74%~96% and good purity. The results confirm that the catalyst can offer definite advantages of good activity, easy separation, mild reaction condition and high yields. Moreover, it can be reused for not less than 5 runs.
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