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0034625935
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0030893869
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0028210619
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0032827689
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0042407721
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Barends, R.J.P.1
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17
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33748819544
-
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For leading references on the [3 + 2] annulation of allyhc silanes, see: (a) Knölker, H.-J.; Foitzik, N.; Goesmann, H.; Graf, R. Angew. Chem., Int. Ed. Engl. 1993, 32, 1081-1083.
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33751391619
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21
-
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0041405376
-
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note
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2. Temperature did not greatly affect the C=O to C=N annulation ratio.
-
-
-
-
22
-
-
0041906504
-
-
note
-
Only the C=N annulation product lactam 4b was obtained if the annulation reaction was conducted in toluene, see ref 6.
-
-
-
-
23
-
-
0041405375
-
-
note
-
A control experiment showed that no interconversion occurred between iminolactone 3a and N-chlorosulfonyl lactam 4a.
-
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25
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0015349005
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(b) Kinoshita, M.; Aburaki, S.; Umezawa, S. J. Antibiot. 1972, 25, 373-376.
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26
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0034613247
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For selected examples of the asymmetric synthesis of (+)-blastmycinone, see: (a) Chen, M.-J.; Lo, C.-Y.; Chin, C.-C.; Liu, R.-S. J. Org. Chem. 2000, 65, 6362-6367.
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(b) Sibi, M. P.; Lu, J.; Talbacka, C. L. J. Org. Chem. 1996, 61, 7848-7855.
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0030883527
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(a) Matsumura, K.; Hashiguchi, S.; Ikariya, T.; Noyori, R. J. Am. Chem. Soc. 1997, 119, 8738-8739.
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32
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0010640653
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The enantiomeric excess of 12 was determined by GC analysis of its Mosher ester: Dale, J. A.; Dull, D. L.; Mosher, H. S. J. Org. Chem. 1969, 34, 2543-2549.
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35
-
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0042908546
-
-
note
-
The enantiomeric excess of 14 and 15 was determined by HPLC analysis using a Chiracel OD-H column, and the enantiomencally enriched material was compared with racemic material.
-
-
-
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37
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37049088928
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(a) Fleming, I.; Henning, R.; Parker, D. C.; Flaut, H. E.; Sanderson, P. E. J. J. Chem. Soc., Perkin Trans. 1 1995, 317-337.
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2NCO in the formal synthesis of a lactam natural product, see: Roberson, C. W.; Woerpel, K. A. Org. Lett. 2000, 2, 621-623.
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