Yadav, J. S. ; Reddy, B. V. S. ; Narayana Reddy, P. (2004) Bi(OTf)3-[Bmim]PF6: a novel and recyclable catalytic system for the diasteroselective synthesis of cis-fused pyrano and furanobenzopyrans Chemistry Letters, 33 (11). pp. 1436-1437. ISSN 0366-7022
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Official URL: http://www.jstage.jst.go.jp/article/cl/33/11/33_14...
Related URL: http://dx.doi.org/10.1246/cl.2004.1436
Abstract
The Stereoselective one-pot synthesis of cis-fused pyrano and furanobenzopyrans has been developed from o-hydroxybenzaldehydes, aromatic amines, and cyclic enol ethers in the presence of Bi(OTf)3 in air- and moisture-stable ionic liquid, [bmim]PF6 under mild conditions. The recovered ionic liquid containing Bi(OTf)3 can be reused three to five subsequent runs with only a gradual decrease in activity. The recovery of catalyst is facilitated by its hydrophobic nature of [bmim]PF6.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Chemical Society of Japan. |
| ID Code: | 63228 |
| Deposited On: | 28 Sep 2011 03:22 |
| Last Modified: | 28 Sep 2011 03:22 |
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