期刊
CATALYSIS COMMUNICATIONS
卷 5, 期 7, 页码 371-375出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.catcom.2004.04.007
关键词
Bis(indolyl)metharies; zeolites; ion-exchange; indole; aldehydes
Zeolites were found to catalyze electrophilic substitution reaction of indole with a variety of aromatic aldehydes affording good to excellent yields of bis(indolyl)methanes at room temperature. Zeolites such as Hbeta, HY and H-ZSM-5 were used as catalysts to assess their catalytic activities in the syntheses of bis(indolyl)methanes. Zn2+ ion-exchanged Y zeolite showed better activity than parent zeolite owing to its higher Lewis acidity. The yield of bis(indolyl)methanes increased in the following order H-ZSM-5
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