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0342888347
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3N, probably due to the tendency of the sulfinyl groups to suffer Pummerer reactions
-
3N, probably due to the tendency of the sulfinyl groups to suffer Pummerer reactions.
-
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36
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0342888344
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note
-
We failed in all the trials to obtain crystals from 9a and 9d, suitable for X-ray diffraction studies. We had the same problem with sulfone 10 (obtained by MCPBA oxidation of 9a) and alcohol 11, (resulting in the stereoselective hydroboration of 9d) which were prepared with this aim.
-
-
-
-
38
-
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0343323307
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note
-
We must also consider that the stereoelectronic interactions between the geminal ester groups in rotamer A, should produce distorsions in the coplanarity decreassing its relative stability.
-
-
-
-
39
-
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0343323308
-
-
note
-
The increase in the stereoselectivity observed with acyclic dienes can be explained from Figure 2. Thus, the absence of the methylene bridge will mainly stabilize the approach 1.
-
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41
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33947481096
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