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Frost, C.G.1
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3
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0029120957
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For recent examples see: a) Hiroi, K.; Yamaoka, N.; Kato, F.; Oishi, K. Tetrahedron Lett. 1995, 36, 7251.
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0343906388
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note
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Stereochemical assignments were made by bromolactonization after hydrolysis of the bicyclolactone 7a. The hydroxy acid from the isomer 7a provided the 5-membered bromolactone by NBS treatment (DMF, 25°C) in 3 hours while that from 8a remained intact under the same reaction conditions.
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16
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49549126692
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b) Trost, B. M.; Arndt, H. C.; Strege, P. E.; Verhoeven, T. R. Tetrahedron Lett. 1976, 39, 3477.
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Arndt, H.C.2
Strege, P.E.3
Verhoeven, T.R.4
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18
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0023883293
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b) Gais, H.-J.; Schmiedl, G.; Ball, W. A.; Bund, J.; Hellmann, G.; Erdelmeier, I. Tetrahedron Lett. 1988, 29, 1773. Rehwinkel, H.; Skupsch, J.; Vorbrüggen, H. Tetrahedron Lett. 1988, 29, 1775.
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Gais, H.-J.1
Schmiedl, G.2
Ball, W.A.3
Bund, J.4
Hellmann, G.5
Erdelmeier, I.6
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19
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0001664246
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b) Gais, H.-J.; Schmiedl, G.; Ball, W. A.; Bund, J.; Hellmann, G.; Erdelmeier, I. Tetrahedron Lett. 1988, 29, 1773. Rehwinkel, H.; Skupsch, J.; Vorbrüggen, H. Tetrahedron Lett. 1988, 29, 1775.
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Rehwinkel, H.1
Skupsch, J.2
Vorbrüggen, H.3
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21
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0022218877
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b) Kojima, K.; Amemiya, S.; Koyama, K.; Sakai, K. Chem. Pharm. Bull. 1985, 33, 2688.
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Kojima, K.1
Amemiya, S.2
Koyama, K.3
Sakai, K.4
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23
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0343470466
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We thank Dr. Rehwinkel of Research Laboratories, Schering AG, Berlin for kindly providing spectral data of the final product 14. a) Benna, B.; Dahl, H.; Vorbrüggen, H. Synthesis 1986, 41.
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(1986)
Synthesis
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Benna, B.1
Dahl, H.2
Vorbrüggen, H.3
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