Sabitha, Gowravaram ; Srinivas Reddy, Ch. ; Maruthi, Ch. ; Venkata Reddy, E. ; Yadav, J. S. (2003) BiCl3-catalyzed diastereoselective intramolecular [4+2] cycloaddition reactions leading to pyrazole annulated new sulfur heterocycles Synthetic Communications, 33 (17). pp. 3063-3070. ISSN 0039-7911
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Official URL: http://www.tandfonline.com/doi/abs/10.1081/SCC-120...
Related URL: http://dx.doi.org/10.1081/SCC-120022482
Abstract
Intramolecular [4+2] cycloaddition reactions of N-aryl imines generated in situ from anilines and the S-allyl derivatives of pyrazole aldehydes have been carried out in the presence of catalytic amounts of BiCl3 to provide the corresponding hexahydropyrazolo [4',3':5,6]thiopyrano[4,3-b]quinolines in excellent yields. The reactions are highly diastereoselective and the only cis products are isolated exclusively.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Taylor and Francis Group. |
| Keywords: | Hetero-Diels-Alder Reaction; Bismuth(III) Chloride; Diastereoselective; Hexahydropyrazolothiopyranoquinolines |
| ID Code: | 62722 |
| Deposited On: | 24 Sep 2011 04:43 |
| Last Modified: | 24 Sep 2011 04:43 |
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