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50
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(b) for a review on benzothiophene S-oxides, see: T. Thiemann, K. Arima, K. Kumazoe and S. Mataka, Rep. Inst. Adv. Mat. Study Kyushu Univ., 2000, 14(2), 139-148; Chem. Abstr., 2001, 326, 134318a.
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(b) for a review on benzothiophene S-oxides, see: T. Thiemann, K. Arima, K. Kumazoe and S. Mataka, Rep. Inst. Adv. Mat. Study Kyushu Univ., 2000, 14(2), 139-148; Chem. Abstr., 2001, 326, 134318a.
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0002470513
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2-Methylbenzothiophene S-oxide (8) is a known material which had been synthesized previously from the corresponding benzothiophene by oxidation with p-nitroperoxybenzoic acid: P. Geneste, J. Grimaud, J. L. Olivé and S. N. Ung, Bull. Soc. Chim. Fr., 1977, 271.
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(a) For preparation and use of benzyne as dienophile, see: R. W. Hoffmann, Dehydrobenzenes and Cycloalkynes, Academic Press, New York, 1967, pp. 200;
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65
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0142108052
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note
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The authors thank Prof. Dr. T. Kitamura of Saga University for a generous donation of 17.
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0142108048
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72
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84982335329
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13C NMR IR and MS. All new compounds gave correct analytical and/or HRMS data. A number of compounds had been synthesized before by alternative routes. For 6h and 6j see: W. Ried and K. Boenninghausen, Ann., 1961, 639, 61. For 6m see:D. CriegeeP. Ludwig, Chem. Ber., 1961, 94, 2038. For 6n see: J. Mueller and A. Huth, Tetrahedron Lett., 1972, 1035. For 6u, see: J. Novrocik, M. Novrocikova and J. Foniok, Collect. Czech Chem Commun., 1984, 49, 218.
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73
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0013500545
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13C NMR IR and MS. All new compounds gave correct analytical and/or HRMS data. A number of compounds had been synthesized before by alternative routes. For 6h and 6j see: W. Ried and K. Boenninghausen, Ann., 1961, 639, 61. For 6m see:D. CriegeeP. Ludwig, Chem. Ber., 1961, 94, 2038. For 6n see: J. Mueller and A. Huth, Tetrahedron Lett., 1972, 1035. For 6u, see: J. Novrocik, M. Novrocikova and J. Foniok, Collect. Czech Chem Commun., 1984, 49, 218.
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74
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49649138819
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13C NMR IR and MS. All new compounds gave correct analytical and/or HRMS data. A number of compounds had been synthesized before by alternative routes. For 6h and 6j see: W. Ried and K. Boenninghausen, Ann., 1961, 639, 61. For 6m see:D. CriegeeP. Ludwig, Chem. Ber., 1961, 94, 2038. For 6n see: J. Mueller and A. Huth, Tetrahedron Lett., 1972, 1035. For 6u, see: J. Novrocik, M. Novrocikova and J. Foniok, Collect. Czech Chem Commun., 1984, 49, 218.
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75
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0142076452
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13C NMR IR and MS. All new compounds gave correct analytical and/or HRMS data. A number of compounds had been synthesized before by alternative routes. For 6h and 6j see: W. Ried and K. Boenninghausen, Ann., 1961, 639, 61. For 6m see:D. CriegeeP. Ludwig, Chem. Ber., 1961, 94, 2038. For 6n see: J. Mueller and A. Huth, Tetrahedron Lett., 1972, 1035. For 6u, see: J. Novrocik, M. Novrocikova and J. Foniok, Collect. Czech Chem Commun., 1984, 49, 218.
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76
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0142108049
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-
note
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4: 306.1831. Found: 306.1827.
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-
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