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33847493488
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Syntheses of α-halogenoglycines from α-thioalkylglycines: see ref 16bl
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33847492214
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33847494120
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4 hydrolysis of the nitrile compound afforded a mixture of 4 (32%) and the symmetrical bis(7-bromoheptane)imide(24%).
-
4 hydrolysis of the nitrile compound afforded a mixture of 4 (32%) and the symmetrical bis(7-bromoheptane)imide(24%).
-
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47
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For recent improvement of the procedure and references for the synthesis of alkyl azide see: Alvarez, S. G.; Alvarez M. T. Synthesis, 1997, 4, 413-414.
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33847504944
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note
-
Optically active benzylic alcohols, S-(-)-1-phenyl ethanol, S-(-)-phenyl-1-butanol,S-(-)-1-(1-naphthyl)ethanol, S-(-)-α-methyl-2-naphthalenemethanol, S-(+)-1-indanol, R-(-)-α-tetralol are commercially available. A slight induction (d.e. 30%) was observed with the latter two compounds as determined by NMR analysis.
-
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-
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49
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0023767792
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Nishizawa, R.; Takei, Y.; Yoshida, M.; Tomiyoshi, T.; Saino, T.; Nishikawa, K.; Nemoto, K.; Takahashi, K.; Fujii, A.; Nakamura, T.; Takita, T.; Takeuchi, T. J. Antibiotic 1988, 41, 1629-43.
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33847503631
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Mayo, D.J.1
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33847505602
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The author has deposited crystallographic data for 7b with the Cambridge Crystallographic Data Center. The data can be obtained, on request, from the Director, Cambridge Crystallographic Data Center, 12 Union Road, Cambridge, CB2 1EZ, U.K.
-
The author has deposited crystallographic data for 7b with the Cambridge Crystallographic Data Center. The data can be obtained, on request, from the Director, Cambridge Crystallographic Data Center, 12 Union Road, Cambridge, CB2 1EZ, U.K.
-
-
-
-
56
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33847527482
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We have checked that there was no epimerisation during saponification of 7a by reesterification of the crude product with an ethereal diazomethane solution and analysis of the crude product by NMR. Attempts to purify and better characterize the acid intermediate revealed its instability.
-
We have checked that there was no epimerisation during saponification of 7a by reesterification of the crude product with an ethereal diazomethane solution and analysis of the crude product by NMR. Attempts to purify and better characterize the acid intermediate revealed its instability.
-
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57
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33847530850
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See ref 8.
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See ref 8.
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58
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33847504075
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(b) See ref 13a.
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Nishikawa, Y.7
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