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For recent reviews, see: (a) Koert, U. Synthesis 1995, 115. (b) Hoppe, R.; Scharf, H. D. Synthesis 1995, 1447. (c) Figadere, B. Acc. Chem. Res. 1995, 28, 359. (d) Zeng, L.; Ye, Q.; Oberlies, N. H.; Shi, G.; Gu, Z.-M.; He, K.; McLaughlin, J. L. Nat. Prod. Rep. 1996, 13, 275.
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Koert, U.1
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For recent reviews, see: (a) Koert, U. Synthesis 1995, 115. (b) Hoppe, R.; Scharf, H. D. Synthesis 1995, 1447. (c) Figadere, B. Acc. Chem. Res. 1995, 28, 359. (d) Zeng, L.; Ye, Q.; Oberlies, N. H.; Shi, G.; Gu, Z.-M.; He, K.; McLaughlin, J. L. Nat. Prod. Rep. 1996, 13, 275.
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For recent reviews, see: (a) Koert, U. Synthesis 1995, 115. (b) Hoppe, R.; Scharf, H. D. Synthesis 1995, 1447. (c) Figadere, B. Acc. Chem. Res. 1995, 28, 359. (d) Zeng, L.; Ye, Q.; Oberlies, N. H.; Shi, G.; Gu, Z.-M.; He, K.; McLaughlin, J. L. Nat. Prod. Rep. 1996, 13, 275.
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For recent reviews, see: (a) Koert, U. Synthesis 1995, 115. (b) Hoppe, R.; Scharf, H. D. Synthesis 1995, 1447. (c) Figadere, B. Acc. Chem. Res. 1995, 28, 359. (d) Zeng, L.; Ye, Q.; Oberlies, N. H.; Shi, G.; Gu, Z.-M.; He, K.; McLaughlin, J. L. Nat. Prod. Rep. 1996, 13, 275.
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0000073094
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(b) Goniodenin, a bis-THF acetogenin has been converted to an isomeric mixture of tristetrahydrofuran acetogenins with m-CPBA: Zhang, Y.; Zeng, L.; Woo, M.-H.; Gu, Z.-M.; Ye, Q.; Wu, F.-E.; McLaughlin, J. L. Heterocycles 1995, 41, 1743.
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30
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16944366313
-
-
note
-
All hydroxypolyene substrates were produced with >95% E or Z purity, with the exception of compound 29, which was prepared as a 1.5:1 mixture of E/Z isomers at the terminal alkene. Please see the Supporting Information for the preparation and characterization of hydroxypolyene substrates.
-
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36
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0025278121
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41
-
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16944362576
-
-
note
-
Small amounts of the diastereomeric lactones produced in each case (14 from the reaction of 11; 13 from the reaction of 12) may be attributed to either chromium-mediated epoxidation or alkene isomerization prior to syn-oxidative cyclization. Gas chromatography analysis of commercial neryl-and geranylacetone (precursors to 11 and 12) revealed that each were contaminated with only 1.2-1.5% of the other isomeric compound, which accounts for some but not all of the slight loss of stereospecificity observed in these reactions.
-
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43
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0000094804
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(b) Hashimoto, M.; Harigaya, H.; Yanagiya, M.; Shirahama, H. Tetrahedron Lett. 1988, 29, 5947.
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Shirahama, H.4
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45
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(d) Hashimoto, M.; Harigaya, H.; Yanagiya, M.; Shirahama, H. J. Org. Chem. 1991, 56, 2299.
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46
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47
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37049048425
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Bailey, N.; Carrington, A.; Lott, K. A. K.; Symons, M. C. R. J. Chem. Soc. 1960, 290.
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49
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0001333219
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(b) Herrmann, W.; Thiel, W. R.; Kühn, F. E.; Fischer, R. W.; Kleine, W.; Herdtweck, E.; Scherer, W.; Mink, J. Inorg. Chem. 1993, 32, 5188.
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Herdtweck, E.6
Scherer, W.7
Mink, J.8
-
51
-
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0017850469
-
-
Kishi first showed that E-trisubstituted alkenyl alcohols analogous to 24 afford trans-tetrahydrofuranyl alcohols via vanadium-catalyzed epoxidation/anti-cyclization. (a) Fukuyama, T.; Vranesic, B.; Negri, P.; Kishi, Y. Tetrahedron Lett. 1978, 31, 2741. (b) Wuts, P. G. M.; D'Costa, R.; Butler, W. J. Org. Chem. 1984, 49, 2582. (c) Reference 12d.
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Vranesic, B.2
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-
52
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0021252586
-
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Kishi first showed that E-trisubstituted alkenyl alcohols analogous to 24 afford trans-tetrahydrofuranyl alcohols via vanadium-catalyzed epoxidation/anti-cyclization. (a) Fukuyama, T.; Vranesic, B.; Negri, P.; Kishi, Y. Tetrahedron Lett. 1978, 31, 2741. (b) Wuts, P. G. M.; D'Costa, R.; Butler, W. J. Org. Chem. 1984, 49, 2582. (c) Reference 12d.
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-
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Wuts, P.G.M.1
D'Costa, R.2
Butler, W.3
-
53
-
-
0017850469
-
-
Reference 12d
-
Kishi first showed that E-trisubstituted alkenyl alcohols analogous to 24 afford trans-tetrahydrofuranyl alcohols via vanadium-catalyzed epoxidation/anti-cyclization. (a) Fukuyama, T.; Vranesic, B.; Negri, P.; Kishi, Y. Tetrahedron Lett. 1978, 31, 2741. (b) Wuts, P. G. M.; D'Costa, R.; Butler, W. J. Org. Chem. 1984, 49, 2582. (c) Reference 12d.
-
-
-
-
54
-
-
16944365024
-
-
note
-
2O afforded 47 and 49 as single diastereomers.
-
-
-
-
55
-
-
16944364005
-
-
note
-
We have noticed that the diastereomer ratios obtained with the dichloroacetylperrhenate reagents varied slightly between experiments, suggesting that there may be a concentration dependence of acid on the stereoselectivity of syn-oxidative cyclization reactions.
-
-
-
-
56
-
-
0027054720
-
-
After considerable difficulty we obtained small amounts of the Mosher esters from reaction of 49 with (R)- and (S)-MTPA (Rieser, M. J.; Hui, Y.-h.; Rupprecht, J. K.; Kozlowski, J. F.; Wood, K. V.; McLaughlin, J. L.; Hanson, P. R.; Zhuang, Z.; Hoye, T. R. J. Am. Chem. Soc. 1992, 114, 10203); however, the chemical shift differences at H14 for each Mosher ester were less than 0.01 ppm. A similarly minute difference in chemical shift was observed in goniocin (ref 3a).
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Rieser, M.J.1
Hui, Y.-H.2
Rupprecht, J.K.3
Kozlowski, J.F.4
Wood, K.V.5
McLaughlin, J.L.6
Hanson, P.R.7
Zhuang, Z.8
Hoye, T.R.9
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