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(a) Bhuyan, P. J.; Boruah, R. C.; Sandhu, J. S. Tetrahedron Lett. 1989, 30, 1421. Baruah, B.; Prajapati, D.; Boruah, R. C.; Sandhu, J. S. Synth. Commun. 1997, 27, 2563.
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39
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20644444050
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note
-
When the reaction of 5 with benzylhydroxylamine was carried out at high temperature, compounds 7 and 8 could be obtained without isolating the intermediate nitrone 6. However, the overall yields were less satisfactory.
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-
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42
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20644459412
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note
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HyperChem program (4.1 version, Autodesck, Inc.).
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43
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20644451979
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note
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2 as catalyst.
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-
-
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44
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20644436639
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note
-
Attempts to isolate 13-15 as hydrochlorides gave highly hygroscopic solids difficult to handle and to characterize. The saturation of the pyrrole nucleus of 8 was also observed, without the presence of hydrogen chloride, using acetic acid as solvent. However, under these conditions, the isolation of the product suffered from a drawback due to the combination of its basicity and volatility.
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45
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0000882942
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For previous NMR studies of pyrrolizidines and indolizidines see refs 4b, 5c, 6b, 6d, and the following: (a) Jones, T. H.; Blum, M. S.; Fales, H. M.; Thompson, C. R. J. Org. Chem. 1980, 45, 4778. (b) Belmont, S. E.; Polniaszek, R. P. J. Org. Chem. 1990, 55, 4688. (c) Bond, T. J.; Jenkins, R.; Ridley, A. C.; Taylor, P. C. J. Chem. Soc., Ferkln Trans. 1 1993, 2241. (d) Logie, C. G.; Grue, M. R.; Liddell, J. R. Phytochemistry 1994, 37, 43.
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Jones, T.H.1
Blum, M.S.2
Fales, H.M.3
Thompson, C.R.4
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46
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0025023824
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For previous NMR studies of pyrrolizidines and indolizidines see refs 4b, 5c, 6b, 6d, and the following: (a) Jones, T. H.; Blum, M. S.; Fales, H. M.; Thompson, C. R. J. Org. Chem. 1980, 45, 4778. (b) Belmont, S. E.; Polniaszek, R. P. J. Org. Chem. 1990, 55, 4688. (c) Bond, T. J.; Jenkins, R.; Ridley, A. C.; Taylor, P. C. J. Chem. Soc., Ferkln Trans. 1 1993, 2241. (d) Logie, C. G.; Grue, M. R.; Liddell, J. R. Phytochemistry 1994, 37, 43.
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Belmont, S.E.1
Polniaszek, R.P.2
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47
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37049083828
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For previous NMR studies of pyrrolizidines and indolizidines see refs 4b, 5c, 6b, 6d, and the following: (a) Jones, T. H.; Blum, M. S.; Fales, H. M.; Thompson, C. R. J. Org. Chem. 1980, 45, 4778. (b) Belmont, S. E.; Polniaszek, R. P. J. Org. Chem. 1990, 55, 4688. (c) Bond, T. J.; Jenkins, R.; Ridley, A. C.; Taylor, P. C. J. Chem. Soc., Ferkln Trans. 1 1993, 2241. (d) Logie, C. G.; Grue, M. R.; Liddell, J. R. Phytochemistry 1994, 37, 43.
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Bond, T.J.1
Jenkins, R.2
Ridley, A.C.3
Taylor, P.C.4
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48
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0028133920
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For previous NMR studies of pyrrolizidines and indolizidines see refs 4b, 5c, 6b, 6d, and the following: (a) Jones, T. H.; Blum, M. S.; Fales, H. M.; Thompson, C. R. J. Org. Chem. 1980, 45, 4778. (b) Belmont, S. E.; Polniaszek, R. P. J. Org. Chem. 1990, 55, 4688. (c) Bond, T. J.; Jenkins, R.; Ridley, A. C.; Taylor, P. C. J. Chem. Soc., Ferkln Trans. 1 1993, 2241. (d) Logie, C. G.; Grue, M. R.; Liddell, J. R. Phytochemistry 1994, 37, 43.
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Phytochemistry
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Logie, C.G.1
Grue, M.R.2
Liddell, J.R.3
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