268
V.T. Kamble et al. / Chinese Chemical Letters 21 (2010) 265–268
In conclusion, we have described herein HClO4–SiO2 as an extremely efficient catalyst for the preparation of
tetrahydroquinolines. The important features of the present method are: (i) room temperature conditions, (ii) use of a
cheap and easy to handle catalyst, (iii) short reaction times, (iv) non-aqueous work-up, (v) high yields, (vi) use of low
amount of catalyst, and (vii) reuse of catalyst.
Acknowledgment
We thank Department of Science and Technology, India (No. SR/FT/CS-019/2008) for their financial support.
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