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The reaction was also performed with the (S)- N -(p -tolylsulfinyl)imine derivative; however, no product was formed, and mostly starting material was recovered from the reaction mixture
-
The reaction was also performed with the (S)- N -(p -tolylsulfinyl)imine derivative; however, no product was formed, and mostly starting material was recovered from the reaction mixture.
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22
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77953299014
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19F NMR on the crude NMR spectra. They were found inaltered after column chromatography. See
-
19F NMR on the crude NMR spectra. They were found inaltered after column chromatography. See
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30
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78650378060
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In all cases, the intermediate product 3a - l could be isolated. Treatment of the former with t -BuOK in THF at -40 °C gave the corresponding cyclized product 2a - l
-
In all cases, the intermediate product 3a - l could be isolated. Treatment of the former with t -BuOK in THF at -40 °C gave the corresponding cyclized product 2a - l.
-
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31
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78650339437
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The required substrates (R, S)- 1a - l are conveniently synthesized from commercially available starting materials in a two-step sequence (see Supporting Information)
-
The required substrates (R, S)- 1a - l are conveniently synthesized from commercially available starting materials in a two-step sequence (see Supporting Information).
-
-
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32
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78650328173
-
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Assuming the reversibility of the aza-Michael addition (see ref 6d) the formation of the thermodynamic product is expected. As can be inferred from the ORTEP diagram (Figure 1, right side), the substituents at the 1 and 3 positions are oriented anti to the bulky substituent on the nitrogen (thus syn to each other)
-
Assuming the reversibility of the aza-Michael addition (see ref 6d) the formation of the thermodynamic product is expected. As can be inferred from the ORTEP diagram (Figure 1, right side), the substituents at the 1 and 3 positions are oriented anti to the bulky substituent on the nitrogen (thus syn to each other).
-
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33
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78650321944
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During the deprotection step, a transesterification reaction with MeOH was observed
-
During the deprotection step, a transesterification reaction with MeOH was observed.
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34
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0018120989
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78650399913
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Moreover, 28% of the noncyclized precursor 3m was also obtained
-
Moreover, 28% of the noncyclized precursor 3m was also obtained.
-
-
-
-
39
-
-
78650385431
-
-
Other methods described for desulfonylation, such as Mg/MeOH, Mg/DMF, and Raney Ni proved ineffective for these systems
-
Other methods described for desulfonylation, such as Mg/MeOH, Mg/DMF, and Raney Ni proved ineffective for these systems.
-
-
-
-
40
-
-
78650393015
-
-
In the desulfonylation step, a transesterification reaction with MeOH took place
-
In the desulfonylation step, a transesterification reaction with MeOH took place.
-
-
-
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