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16
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0000357537
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0009568314
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Alderdice, M.1
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23
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84914322252
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NaH, THF, rt: 48% yield, 9βH/9αH=4/1 conditions
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(a) NaH, THF, rt: 48% yield, 9βH/9αH=4/1 (conditions: Clark, R. D.; Kozar, L. G.; Heathcock, C. H. Synth. Commun. 1975, 5, 1-5);
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Clark, R.D.1
Kozar, L.G.2
Heathcock, C.H.3
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24
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0000376544
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3, THF, rt: 50% yield, 9βH/9αH=1/1 conditions
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3, THF, rt: 50% yield, 9βH/9αH=1/1 (conditions: Corey, E. J.; Virgil, S. C. J. Am. Chem. Soc. 1990, 112, 6429-6431);
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Corey, E.J.1
Virgil, S.C.2
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25
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0009600221
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3, toluene, 110°C: 31% yield, 9βH/9αH=1/1.
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3, toluene, 110°C: 31% yield, 9βH/9αH=1/1.
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27
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0000476716
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Blanchette, M. A.; Choy, W.; Davis, J. T.; Essenfeld, A. P.; Masamune, S.; Roush, W. R.; Sakai, T. Tetrahedron Lett. 1984, 25, 2183-2186.
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Blanchette, M.A.1
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Masamune, S.5
Roush, W.R.6
Sakai, T.7
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28
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0009635060
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-
note
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3) δ 16.6; 17.4; 21.8; 22.6; 23.7; 29.1; 33.6; 34.8; 35.5; 35.9; 39.1; 43.6; 48.6; 51.9; 57.8; 59.6; 88.4; 215.6.
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29
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0009578884
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Prepared in the same way as 5. A methyl ether was introduced at C-3 because the TBS ether of aldehyde 5 was not stable under the acidic conditions of the ene cyclisation
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Prepared in the same way as 5. A methyl ether was introduced at C-3 because the TBS ether of aldehyde 5 was not stable under the acidic conditions of the ene cyclisation.
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30
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0041807380
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Griffith, W. P.; Ley, S. V.; Whitcombe, G. P.; White, A. D. J. Chem. Soc., Chem. Commun. 1987, 1625-1627.
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Griffith, W.P.1
Ley, S.V.2
Whitcombe, G.P.3
White, A.D.4
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32
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0009650694
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The reaction time (25 min) is critical since longer reaction times result in epimerisation at C-9
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The reaction time (25 min) is critical since longer reaction times result in epimerisation at C-9.
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34
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0001290261
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In comprehensive organic synthesis
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Trost, B. M., Fleming, I., Eds.; Pergamon: Oxford
-
Snider, B. B. In comprehensive organic synthesis; Trost, B. M., Fleming, I., Eds.; The Prins and Carbonyl Ene Reactions. Pergamon: Oxford, 1991; Vol. 2, pp. 527-561.
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(1991)
The Prins and Carbonyl Ene Reactions
, vol.2
, pp. 527-561
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Snider, B.B.1
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35
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0001673303
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Andersen, N. H.; Hadley, S. W; Kelly, J. D.; Bacon, E. R. J. Org. Chem. 1985, 50, 4144-4151.
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J. Org. Chem.
, vol.50
, pp. 4144-4151
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Andersen, N.H.1
Hadley, S.W.2
Kelly, J.D.3
Bacon, E.R.4
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37
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0009580271
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Crystallographic data for 12 and 15 have been deposited with the Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge CB2 1EZ, UK. Fax: +44 1223 336033; e-mail: deposit@ccdc.cam.ac.uk
-
Crystallographic data for 12 and 15 have been deposited with the Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge CB2 1EZ, UK. Fax: +44 1223 336033; e-mail: deposit@ccdc.cam.ac.uk
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39
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0002664878
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Furukawa, J.; Kawabata, N.; Nishimura, J. Tetrahedron 1968, 24, 53-58.
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(1968)
Tetrahedron
, vol.24
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Furukawa, J.1
Kawabata, N.2
Nishimura, J.3
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41
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0000243233
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Attempts to cyclopropanate with samarium amalgam resulted here in the transformation of the cyclopentenol into a cyclopentadiene.
-
Attempts to cyclopropanate with samarium amalgam (Molander, G. A.; Harring, L. S. J. Org. Chem. 1989, 54, 3525-3532) resulted here in the transformation of the cyclopentenol into a cyclopentadiene.
-
J. Org. Chem. 1989
, vol.54
, pp. 3525-3532
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Molander, G.A.1
Harring, L.S.2
-
42
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0009642196
-
-
The introduction of an angular methyl by directed cyclopropanation, oxidation, and dissolving metal reduction has been described earlier
-
The introduction of an angular methyl by directed cyclopropanation, oxidation, and dissolving metal reduction has been described earlier: Packer, R. A.; Whitehurst, J. S. J. Chem. Soc., Chem. Commun. 1975, 757-758.
-
(1975)
J. Chem. Soc., Chem. Commun.
, pp. 757-758
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Packer, R.A.1
Whitehurst, J.S.2
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44
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0009650695
-
-
3) δ 0.80 (s, 3H); 1.00 (s, 3H); 1.01 (s, 3H); 1.14 (s, 3H); 2.73 (dd, J=5.0, 10.9 Hz, 1H); 3.37 (s, 3H)
-
3) δ 0.80 (s, 3H); 1.00 (s, 3H); 1.01 (s, 3H); 1.14 (s, 3H); 2.73 (dd, J=5.0, 10.9 Hz, 1H); 3.37 (s, 3H).
-
-
-
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46
-
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84985485567
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-
For an analogue see
-
For an analogue see: Wahlberg, I.; Karlsson, K.; Enzell, C. R. Org. Mass Spectrom. 1975, 10, 162-177.
-
(1975)
Org. Mass Spectrom.
, vol.10
, pp. 162-177
-
-
Wahlberg, I.1
Karlsson, K.2
Enzell, C.R.3
-
47
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0000618848
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Wahlberg, I.; Almqvist, S. O.; Nishida, T.; Enzell, C. R. Acta Chem. Scand. 1975, B 29, 1047-1058.
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(1975)
Acta Chem. Scand.
, vol.29 B
, pp. 1047-1058
-
-
Wahlberg, I.1
Almqvist, S.O.2
Nishida, T.3
Enzell, C.R.4
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