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79851477931
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Crystallographic data CIF for the structure reported in this manuscript have been deposited with the Cambridge Crystallographic Data Centre CCDC and allocated the deposition number CCDC-796928 for compound 5a. A copy of the data can be obtained free of charge on application to the CCDC, 12 Union Road, Cambridge, CB2 IEZ, UK; fax: 44 01223 336 033; email: deposit@ccdc.cam.ac.uk
-
Crystallographic data (CIF) for the structure reported in this manuscript have been deposited with the Cambridge Crystallographic Data Centre (CCDC) and allocated the deposition number CCDC-796928 for compound 5a. A copy of the data can be obtained free of charge on application to the CCDC, 12 Union Road, Cambridge, CB2 IEZ, UK; fax: (44) 01223 336 033; email: deposit@ccdc.cam.ac.uk.
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79851482021
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This result is in contrast to cycloaddition reactions of azomethine ylide 2a with benzaldehydes which appear to be unaffected by substitution with electron-donating groups see ref 6d
-
This result is in contrast to cycloaddition reactions of azomethine ylide 2a with benzaldehydes which appear to be unaffected by substitution with electron-donating groups (see ref 6d).
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42
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79851490102
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2Ph, 3.53 s, 2H, N4′, 3.38 s, 3H, N1Me
-
2Ph), 3.53 (s, 2H, N4′), 3.38 (s, 3H, N1Me).
-
-
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43
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79851473497
-
-
instability of intermediate 7 has so far prevented its purification
-
The instability of intermediate 7 has so far prevented its purification.
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45
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70249141289
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A related ring-opening and decarboxylation of spiro-benzooxazine pyrrolidines has recently been reported
-
A related ring-opening and decarboxylation of spiro-(benzooxazine) pyrrolidines has recently been reported: Nicolaou, K. C.; Krasovskiy, A.; Majunder, U.; Trepanier, V. E.; Chen, D. Y.-K. J. Am. Chem. Soc. 2009, 131, 3690.
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48
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79851478336
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Alternative mechanisms, involving electrocyclic extrusion of carbon dioxide from 7 or 8, have been considered; however, these mechanisms would require formation of high energy nonaromatic intermediates
-
Alternative mechanisms, involving electrocyclic extrusion of carbon dioxide from 7 or 8, have been considered; however, these mechanisms would require formation of high energy nonaromatic intermediates.
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50
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0024239320
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