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3142710281
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0037038028
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21
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3142705962
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note
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3S: C, 59.30; H, 4.98; N, 5.32; S, 12.18. Found: C, 59.03; H, 4.92; N, 5.33; S, 12.24.
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22
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0001655313
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Greenhill, J. V.; Ramli, M.; Tomassini, T. J. Chem. Soc., Perkin Trans. 1 1975, 588.
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23
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3142779326
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note
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Strong intramolecular 1,5-interactions of nonbonded S and O within the SC=CC=O subunit with cis-configuration of C=C bond additionally stabilize the enaminone structure.
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25
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0000745489
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(b) Brown, H. C.; Narasimhan, S.; Choi, Y. M. J. Org. Chem. 1982, 47, 4702.
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28
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0000583739
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(b) For a reduction of lactams to amines by NaBH4, see: Mandal, S. B.; G iri, V. S.; Sabeena, M. S.; Pakrashi, S. C. J. Org. Chem. 1988, 53, 4236.
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29
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3142682431
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note
-
Methylation of (Z)-5a led to alcohol 13f, which, in a one-pot sequence, comprising reduction followed by cyclization, was transformed into the identical bicylic thiazolidine 6f in moderate yield (Scheme 4). (Equation Presented)
-
-
-
-
30
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3142675101
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note
-
13C chemical shifts (85-96 ppm) for the acceptor-substituted C(α) atoms, and low field shifts (161-169 ppm) for the donor-substituted C(β) atoms are typical.
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31
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0030192847
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