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58149200125
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For general reviews on cycloadditions, see:
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58149191830
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40
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58149200127
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For reviews, see
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For reviews, see:
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43
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58149180525
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For reviews on oxyallyl cation [4, 3] cycloadditions, see
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58149190405
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50
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58149200128
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55
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58149181936
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For an elegant approach to bielschowskysin, see:
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59
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58149188437
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For a leading reference, see
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For a leading reference, see:
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58149182839
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See the Supporting Information
-
See the Supporting Information.
-
-
-
-
63
-
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58149184272
-
-
Hexane and THF were examined but not useful
-
Hexane and THF were examined but not useful.
-
-
-
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64
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-
0037955598
-
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2, see: Thomazeau, C.; Olivier-Bourbigou, H.; Magna, L.; Luts, S.; Gilbert, B. J. Am. Chem. Soc. 2003, 125, 5264, and references cited therein.
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2, see: Thomazeau, C.; Olivier-Bourbigou, H.; Magna, L.; Luts, S.; Gilbert, B. J. Am. Chem. Soc. 2003, 125, 5264, and references cited therein.
-
-
-
-
66
-
-
58149192106
-
-
1,3-Dioxane based vinyl acetal i led to a comparable outcome.
-
1,3-Dioxane based vinyl acetal i led to a comparable outcome.
-
-
-
-
69
-
-
58149201528
-
-
4 with no changes in the yield of alkene 12 (or 16).
-
4 with no changes in the yield of alkene 12 (or 16).
-
-
-
-
70
-
-
58149188432
-
-
The crude reaction mixture from cis-19 was analyzed within the first 5 s, and the ratio of unreacted cis-19/20 was 2:1. The reaction of trans 19 was too fast and completed within 5 s. Thus, it was inconclusive in assessing the integrity of olefin stereochemistry in this case. We are again grateful for the reviewers insightful suggestions
-
The crude reaction mixture from cis-19 was analyzed within the first 5 s, and the ratio of unreacted cis-19/20 was 2:1. The reaction of trans 19 was too fast and completed within 5 s. Thus, it was inconclusive in assessing the integrity of olefin stereochemistry in this case. We are again grateful for the reviewers insightful suggestions.
-
-
-
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71
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0035036564
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2. see: (a) Chavan, S. P.; Sharma, A. K. Synlett 2001, 667.
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2. see: (a) Chavan, S. P.; Sharma, A. K. Synlett 2001, 667.
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72
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58149189025
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2.
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2.
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37049088605
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For total syntheses, see: (a) Snider, B.; Lu, Q. Synth. Commun. 1997, 27, 1583.
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0026557439
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2OH, benzene, 80 °C, 48 h. See: Otera, J.; Dan-Oh, N.; Nozaki, H. Tetrahedron 1992, 48, 1449.
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2OH, benzene, 80 °C, 48 h. See: Otera, J.; Dan-Oh, N.; Nozaki, H. Tetrahedron 1992, 48, 1449.
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