메뉴 건너뛰기




Volumn , Issue 12, 1996, Pages 1499-1508

Synthesis of polysubstituted stereodefined olefins via the reactivity of sp2 organo-gem-bismetallics

Author keywords

1,2 metalate rearrangement; allylmetalation; chlorocarbenoids; stereodefined olefins

Indexed keywords

ALKADIENE; ALKENE DERIVATIVE;

EID: 0030457756     PISSN: 00397881     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-1996-4422     Document Type: Article
Times cited : (50)

References (70)
  • 1
    • 84989456545 scopus 로고
    • Normant, J.F.; Alexakis, A. Synthesis 1981, 841. Bartoli, G.; Marcantoni, E.; Sambri, L.; Tamburini, M. Angew. Chem. 1995, 107, 2163; Angew. Chem. Int. Ed. Engl. 1995, 34, 2046. Fujimura, O.; Fu, G.C.; Rothemund, P.W.K.; Grubbs, R.H. J. Am. Chem. Soc. 1995, 117, 2355 and references cited therein. Denmark, S.E.; Amburgey, J. J. Am. Chem. Soc. 1993, 115, 10386.
    • (1981) Synthesis , pp. 841
    • Normant, J.F.1    Alexakis, A.2
  • 2
    • 0042406133 scopus 로고
    • Normant, J.F.; Alexakis, A. Synthesis 1981, 841. Bartoli, G.; Marcantoni, E.; Sambri, L.; Tamburini, M. Angew. Chem. 1995, 107, 2163; Angew. Chem. Int. Ed. Engl. 1995, 34, 2046. Fujimura, O.; Fu, G.C.; Rothemund, P.W.K.; Grubbs, R.H. J. Am. Chem. Soc. 1995, 117, 2355 and references cited therein. Denmark, S.E.; Amburgey, J. J. Am. Chem. Soc. 1993, 115, 10386.
    • (1995) Angew. Chem. , vol.107 , pp. 2163
    • Bartoli, G.1    Marcantoni, E.2    Sambri, L.3    Tamburini, M.4
  • 3
    • 33751130010 scopus 로고
    • Normant, J.F.; Alexakis, A. Synthesis 1981, 841. Bartoli, G.; Marcantoni, E.; Sambri, L.; Tamburini, M. Angew. Chem. 1995, 107, 2163; Angew. Chem. Int. Ed. Engl. 1995, 34, 2046. Fujimura, O.; Fu, G.C.; Rothemund, P.W.K.; Grubbs, R.H. J. Am. Chem. Soc. 1995, 117, 2355 and references cited therein. Denmark, S.E.; Amburgey, J. J. Am. Chem. Soc. 1993, 115, 10386.
    • (1995) Angew. Chem. Int. Ed. Engl. , vol.34 , pp. 2046
  • 4
    • 0012926776 scopus 로고
    • and references cited therein
    • Normant, J.F.; Alexakis, A. Synthesis 1981, 841. Bartoli, G.; Marcantoni, E.; Sambri, L.; Tamburini, M. Angew. Chem. 1995, 107, 2163; Angew. Chem. Int. Ed. Engl. 1995, 34, 2046. Fujimura, O.; Fu, G.C.; Rothemund, P.W.K.; Grubbs, R.H. J. Am. Chem. Soc. 1995, 117, 2355 and references cited therein. Denmark, S.E.; Amburgey, J. J. Am. Chem. Soc. 1993, 115, 10386.
    • (1995) J. Am. Chem. Soc. , vol.117 , pp. 2355
    • Fujimura, O.1    Fu, G.C.2    Rothemund, P.W.K.3    Grubbs, R.H.4
  • 5
    • 84989585272 scopus 로고
    • Normant, J.F.; Alexakis, A. Synthesis 1981, 841. Bartoli, G.; Marcantoni, E.; Sambri, L.; Tamburini, M. Angew. Chem. 1995, 107, 2163; Angew. Chem. Int. Ed. Engl. 1995, 34, 2046. Fujimura, O.; Fu, G.C.; Rothemund, P.W.K.; Grubbs, R.H. J. Am. Chem. Soc. 1995, 117, 2355 and references cited therein. Denmark, S.E.; Amburgey, J. J. Am. Chem. Soc. 1993, 115, 10386.
    • (1993) J. Am. Chem. Soc. , vol.115 , pp. 10386
    • Denmark, S.E.1    Amburgey, J.2
  • 34
    • 84937194211 scopus 로고
    • Yoshida, T.; Negishi, E.I. J. Am. Chem. Soc. 1981, 103, 1276. Negishi, E.I. Pure Appl. Chem. 1981, 53, 2333.
    • (1981) Pure Appl. Chem. , vol.53 , pp. 2333
    • Negishi, E.I.1
  • 35
    • 0007671743 scopus 로고
    • Tucker, C.E.; Knochel, P. J. Am. Chem. Soc. 1991, 113, 9888. Tucker, C.E.; Greve, B.; Klein, W.; Knochel, P. Organometallics 1991, 13, 94.
    • (1991) J. Am. Chem. Soc. , vol.113 , pp. 9888
    • Tucker, C.E.1    Knochel, P.2
  • 38
    • 0028831919 scopus 로고
    • and references cited therein
    • Pelter, A.; Colclough, E.M. Tetrahedron 1995, 51, 811 and references cited therein. Cooke, M.P.Jr. J. Org. Chem. 1994, 59, 2930.
    • (1995) Tetrahedron , vol.51 , pp. 811
    • Pelter, A.1    Colclough, E.M.2
  • 39
    • 0000823612 scopus 로고
    • Pelter, A.; Colclough, E.M. Tetrahedron 1995, 51, 811 and references cited therein. Cooke, M.P.Jr. J. Org. Chem. 1994, 59, 2930.
    • (1994) J. Org. Chem. , vol.59 , pp. 2930
    • Cooke Jr., M.P.1
  • 40
    • 0000286170 scopus 로고
    • Srebnik, M.; Deloux, L.; Sabat, M. J. Org. Chem. 1995, 69, 3276. Deloux, L.; Srebnik, M. J. Org. Chem. 1994, 59, 6871. Deloux, L.; Skrzypcyak-Jankun, E.; Cheesman, B.V.; Srebnik, M.; Sabat, M. J. Am. Chem. Soc. 1994, 116, 10302.
    • (1995) J. Org. Chem. , vol.69 , pp. 3276
    • Srebnik, M.1    Deloux, L.2    Sabat, M.3
  • 41
    • 0001432298 scopus 로고
    • Srebnik, M.; Deloux, L.; Sabat, M. J. Org. Chem. 1995, 69, 3276. Deloux, L.; Srebnik, M. J. Org. Chem. 1994, 59, 6871. Deloux, L.; Skrzypcyak-Jankun, E.; Cheesman, B.V.; Srebnik, M.; Sabat, M. J. Am. Chem. Soc. 1994, 116, 10302.
    • (1994) J. Org. Chem. , vol.59 , pp. 6871
    • Deloux, L.1    Srebnik, M.2
  • 44
    • 84889542968 scopus 로고
    • Neghisi, E.I.; Sawada, H.; Tour, J.M.; Wei, Y. J. Org. Chem. 1988, 53, 915. Wei, Y. Goadeng Xuexia Huaxue Xuebao 1994, 15, 1497; Chem. Abstr. 1995, 122, 132635h.
    • (1994) Goadeng Xuexia Huaxue Xuebao , vol.15 , pp. 1497
    • Wei, Y.1
  • 45
    • 84915358850 scopus 로고
    • Neghisi, E.I.; Sawada, H.; Tour, J.M.; Wei, Y. J. Org. Chem. 1988, 53, 915. Wei, Y. Goadeng Xuexia Huaxue Xuebao 1994, 15, 1497; Chem. Abstr. 1995, 122, 132635h.
    • (1995) Chem. Abstr. , vol.122
  • 46
    • 0000342468 scopus 로고
    • Marek, I.; Lefrançois, J.M.; Normant, J.F. Bull. Soc. Chim. Fr. 1994, 131, 910. Marek, I.; Lefrançois, J.M.; Normant, J.F. J. Org. Chem. 1994, 59, 4154. Brasseur, D.; Marek, I.; Normant, J.F. Tetrahedron 1996, 52, 7235 and references cited therein.
    • (1994) Bull. Soc. Chim. Fr. , vol.131 , pp. 910
    • Marek, I.1    Lefrançois, J.M.2    Normant, J.F.3
  • 47
    • 33751158970 scopus 로고
    • Marek, I.; Lefrançois, J.M.; Normant, J.F. Bull. Soc. Chim. Fr. 1994, 131, 910. Marek, I.; Lefrançois, J.M.; Normant, J.F. J. Org. Chem. 1994, 59, 4154. Brasseur, D.; Marek, I.; Normant, J.F. Tetrahedron 1996, 52, 7235 and references cited therein.
    • (1994) J. Org. Chem. , vol.59 , pp. 4154
    • Marek, I.1    Lefrançois, J.M.2    Normant, J.F.3
  • 48
    • 0029877445 scopus 로고    scopus 로고
    • and references cited therein
    • Marek, I.; Lefrançois, J.M.; Normant, J.F. Bull. Soc. Chim. Fr. 1994, 131, 910. Marek, I.; Lefrançois, J.M.; Normant, J.F. J. Org. Chem. 1994, 59, 4154. Brasseur, D.; Marek, I.; Normant, J.F. Tetrahedron 1996, 52, 7235 and references cited therein.
    • (1996) Tetrahedron , vol.52 , pp. 7235
    • Brasseur, D.1    Marek, I.2    Normant, J.F.3
  • 50
    • 84889524963 scopus 로고    scopus 로고
    • note
    • Although organo-gem-bismetallics are represented as monomers they can, in fact, be aggregates whose degree of association may be affected by several factors.
  • 51
    • 0001054794 scopus 로고
    • Gaudemar, M. C.R. Acad. Sci. Paris, Série C 1971, 273, 1669. Frangin, Y.; Gaudemar, M. C.R. Acad. Sci. Paris, Série C 1974, 278, 885. Frangin, Y.; Gaudemar, M. Synthesis 1977, 205. Auger, J.; Courtois, G.; Miginiac, L. J. Organomet. Chem. 1977, 133, 285. Courtois, G.; Miginiac, L. C.R. Acad. Sci. Paris, Série C 1977, 285, 207. Bernardou, F.; Miginiac, L. C.R. Acad. Sci. Paris, Série C 1975, 280, 1473. Bernardou, F.; Miginiac, L. Tetrahedron Lett. 1976, 3083. Bertrand, M.T.; Courtois, G.; Miginiac, L. Tetrahedron Lett. 1974, 1945. Bertrand, M.T.; Courtois, G.; Miginiac, L. Tetrahedron Lett. 1975, 3147.
    • (1971) C.R. Acad. Sci. Paris, Série C , vol.273 , pp. 1669
    • Gaudemar, M.1
  • 52
    • 0001675293 scopus 로고
    • Gaudemar, M. C.R. Acad. Sci. Paris, Série C 1971, 273, 1669. Frangin, Y.; Gaudemar, M. C.R. Acad. Sci. Paris, Série C 1974, 278, 885. Frangin, Y.; Gaudemar, M. Synthesis 1977, 205. Auger, J.; Courtois, G.; Miginiac, L. J. Organomet. Chem. 1977, 133, 285. Courtois, G.; Miginiac, L. C.R. Acad. Sci. Paris, Série C 1977, 285, 207. Bernardou, F.; Miginiac, L. C.R. Acad. Sci. Paris, Série C 1975, 280, 1473. Bernardou, F.; Miginiac, L. Tetrahedron Lett. 1976, 3083. Bertrand, M.T.; Courtois, G.; Miginiac, L. Tetrahedron Lett. 1974, 1945. Bertrand, M.T.; Courtois, G.; Miginiac, L. Tetrahedron Lett. 1975, 3147.
    • (1974) C.R. Acad. Sci. Paris, Série C , vol.278 , pp. 885
    • Frangin, Y.1    Gaudemar, M.2
  • 53
    • 0008038191 scopus 로고
    • Gaudemar, M. C.R. Acad. Sci. Paris, Série C 1971, 273, 1669. Frangin, Y.; Gaudemar, M. C.R. Acad. Sci. Paris, Série C 1974, 278, 885. Frangin, Y.; Gaudemar, M. Synthesis 1977, 205. Auger, J.; Courtois, G.; Miginiac, L. J. Organomet. Chem. 1977, 133, 285. Courtois, G.; Miginiac, L. C.R. Acad. Sci. Paris, Série C 1977, 285, 207. Bernardou, F.; Miginiac, L. C.R. Acad. Sci. Paris, Série C 1975, 280, 1473. Bernardou, F.; Miginiac, L. Tetrahedron Lett. 1976, 3083. Bertrand, M.T.; Courtois, G.; Miginiac, L. Tetrahedron Lett. 1974, 1945. Bertrand, M.T.; Courtois, G.; Miginiac, L. Tetrahedron Lett. 1975, 3147.
    • (1977) Synthesis , pp. 205
    • Frangin, Y.1    Gaudemar, M.2
  • 54
    • 0008086878 scopus 로고
    • Gaudemar, M. C.R. Acad. Sci. Paris, Série C 1971, 273, 1669. Frangin, Y.; Gaudemar, M. C.R. Acad. Sci. Paris, Série C 1974, 278, 885. Frangin, Y.; Gaudemar, M. Synthesis 1977, 205. Auger, J.; Courtois, G.; Miginiac, L. J. Organomet. Chem. 1977, 133, 285. Courtois, G.; Miginiac, L. C.R. Acad. Sci. Paris, Série C 1977, 285, 207. Bernardou, F.; Miginiac, L. C.R. Acad. Sci. Paris, Série C 1975, 280, 1473. Bernardou, F.; Miginiac, L. Tetrahedron Lett. 1976, 3083. Bertrand, M.T.; Courtois, G.; Miginiac, L. Tetrahedron Lett. 1974, 1945. Bertrand, M.T.; Courtois, G.; Miginiac, L. Tetrahedron Lett. 1975, 3147.
    • (1977) J. Organomet. Chem. , vol.133 , pp. 285
    • Auger, J.1    Courtois, G.2    Miginiac, L.3
  • 55
    • 0038394003 scopus 로고
    • Gaudemar, M. C.R. Acad. Sci. Paris, Série C 1971, 273, 1669. Frangin, Y.; Gaudemar, M. C.R. Acad. Sci. Paris, Série C 1974, 278, 885. Frangin, Y.; Gaudemar, M. Synthesis 1977, 205. Auger, J.; Courtois, G.; Miginiac, L. J. Organomet. Chem. 1977, 133, 285. Courtois, G.; Miginiac, L. C.R. Acad. Sci. Paris, Série C 1977, 285, 207. Bernardou, F.; Miginiac, L. C.R. Acad. Sci. Paris, Série C 1975, 280, 1473. Bernardou, F.; Miginiac, L. Tetrahedron Lett. 1976, 3083. Bertrand, M.T.; Courtois, G.; Miginiac, L. Tetrahedron Lett. 1974, 1945. Bertrand, M.T.; Courtois, G.; Miginiac, L. Tetrahedron Lett. 1975, 3147.
    • (1977) C.R. Acad. Sci. Paris, Série C , vol.285 , pp. 207
    • Courtois, G.1    Miginiac, L.2
  • 56
    • 0038394002 scopus 로고
    • Gaudemar, M. C.R. Acad. Sci. Paris, Série C 1971, 273, 1669. Frangin, Y.; Gaudemar, M. C.R. Acad. Sci. Paris, Série C 1974, 278, 885. Frangin, Y.; Gaudemar, M. Synthesis 1977, 205. Auger, J.; Courtois, G.; Miginiac, L. J. Organomet. Chem. 1977, 133, 285. Courtois, G.; Miginiac, L. C.R. Acad. Sci. Paris, Série C 1977, 285, 207. Bernardou, F.; Miginiac, L. C.R. Acad. Sci. Paris, Série C 1975, 280, 1473. Bernardou, F.; Miginiac, L. Tetrahedron Lett. 1976, 3083. Bertrand, M.T.; Courtois, G.; Miginiac, L. Tetrahedron Lett. 1974, 1945. Bertrand, M.T.; Courtois, G.; Miginiac, L. Tetrahedron Lett. 1975, 3147.
    • (1975) C.R. Acad. Sci. Paris, Série C , vol.280 , pp. 1473
    • Bernardou, F.1    Miginiac, L.2
  • 57
    • 0002470170 scopus 로고
    • Gaudemar, M. C.R. Acad. Sci. Paris, Série C 1971, 273, 1669. Frangin, Y.; Gaudemar, M. C.R. Acad. Sci. Paris, Série C 1974, 278, 885. Frangin, Y.; Gaudemar, M. Synthesis 1977, 205. Auger, J.; Courtois, G.; Miginiac, L. J. Organomet. Chem. 1977, 133, 285. Courtois, G.; Miginiac, L. C.R. Acad. Sci. Paris, Série C 1977, 285, 207. Bernardou, F.; Miginiac, L. C.R. Acad. Sci. Paris, Série C 1975, 280, 1473. Bernardou, F.; Miginiac, L. Tetrahedron Lett. 1976, 3083. Bertrand, M.T.; Courtois, G.; Miginiac, L. Tetrahedron Lett. 1974, 1945. Bertrand, M.T.; Courtois, G.; Miginiac, L. Tetrahedron Lett. 1975, 3147.
    • (1976) Tetrahedron Lett. , pp. 3083
    • Bernardou, F.1    Miginiac, L.2
  • 58
    • 0002443236 scopus 로고
    • Gaudemar, M. C.R. Acad. Sci. Paris, Série C 1971, 273, 1669. Frangin, Y.; Gaudemar, M. C.R. Acad. Sci. Paris, Série C 1974, 278, 885. Frangin, Y.; Gaudemar, M. Synthesis 1977, 205. Auger, J.; Courtois, G.; Miginiac, L. J. Organomet. Chem. 1977, 133, 285. Courtois, G.; Miginiac, L. C.R. Acad. Sci. Paris, Série C 1977, 285, 207. Bernardou, F.; Miginiac, L. C.R. Acad. Sci. Paris, Série C 1975, 280, 1473. Bernardou, F.; Miginiac, L. Tetrahedron Lett. 1976, 3083. Bertrand, M.T.; Courtois, G.; Miginiac, L. Tetrahedron Lett. 1974, 1945. Bertrand, M.T.; Courtois, G.; Miginiac, L. Tetrahedron Lett. 1975, 3147.
    • (1974) Tetrahedron Lett. , pp. 1945
    • Bertrand, M.T.1    Courtois, G.2    Miginiac, L.3
  • 59
    • 0005088449 scopus 로고
    • Gaudemar, M. C.R. Acad. Sci. Paris, Série C 1971, 273, 1669. Frangin, Y.; Gaudemar, M. C.R. Acad. Sci. Paris, Série C 1974, 278, 885. Frangin, Y.; Gaudemar, M. Synthesis 1977, 205. Auger, J.; Courtois, G.; Miginiac, L. J. Organomet. Chem. 1977, 133, 285. Courtois, G.; Miginiac, L. C.R. Acad. Sci. Paris, Série C 1977, 285, 207. Bernardou, F.; Miginiac, L. C.R. Acad. Sci. Paris, Série C 1975, 280, 1473. Bernardou, F.; Miginiac, L. Tetrahedron Lett. 1976, 3083. Bertrand, M.T.; Courtois, G.; Miginiac, L. Tetrahedron Lett. 1974, 1945. Bertrand, M.T.; Courtois, G.; Miginiac, L. Tetrahedron Lett. 1975, 3147.
    • (1975) Tetrahedron Lett. , pp. 3147
    • Bertrand, M.T.1    Courtois, G.2    Miginiac, L.3
  • 61
    • 0013671632 scopus 로고
    • Courtois, G.; Masson, A.; Miginiac, L. C.R. Acad. Sci. Paris, Série C 1978, 256, 265. Van der Louw, J.; Van der Baan, J.L.; Stieltjes, H.; Bickelhaupt, F.; Klumpp, G.M. Tetrahedron Lett. 1987, 28, 5929. Oppolzer, W. Angew. Chem. Int. Ed. Engl. 1989, 28, 38. Oppolzer, W. Comprehensive Organic Synthesis, Trost, B.; Fleming, I., Eds.; Pergamon: 1991, 5, pp 28-61. Roush, W. Comprehensive Organic Synthesis, Trost, B.; Fleming, I., Eds.; Pergamon: 1991, 2, 1.
    • (1978) C.R. Acad. Sci. Paris, Série C , vol.256 , pp. 265
    • Courtois, G.1    Masson, A.2    Miginiac, L.3
  • 62
    • 0000926538 scopus 로고
    • Courtois, G.; Masson, A.; Miginiac, L. C.R. Acad. Sci. Paris, Série C 1978, 256, 265. Van der Louw, J.; Van der Baan, J.L.; Stieltjes, H.; Bickelhaupt, F.; Klumpp, G.M. Tetrahedron Lett. 1987, 28, 5929. Oppolzer, W. Angew. Chem. Int. Ed. Engl. 1989, 28, 38. Oppolzer, W. Comprehensive Organic Synthesis, Trost, B.; Fleming, I., Eds.; Pergamon: 1991, 5, pp 28-61. Roush, W. Comprehensive Organic Synthesis, Trost, B.; Fleming, I., Eds.; Pergamon: 1991, 2, 1.
    • (1987) Tetrahedron Lett. , vol.28 , pp. 5929
    • Van Der Louw, J.1    Van Der Baan, J.L.2    Stieltjes, H.3    Bickelhaupt, F.4    Klumpp, G.M.5
  • 63
    • 84990107570 scopus 로고
    • Courtois, G.; Masson, A.; Miginiac, L. C.R. Acad. Sci. Paris, Série C 1978, 256, 265. Van der Louw, J.; Van der Baan, J.L.; Stieltjes, H.; Bickelhaupt, F.; Klumpp, G.M. Tetrahedron Lett. 1987, 28, 5929. Oppolzer, W. Angew. Chem. Int. Ed. Engl. 1989, 28, 38. Oppolzer, W. Comprehensive Organic Synthesis, Trost, B.; Fleming, I., Eds.; Pergamon: 1991, 5, pp 28-61. Roush, W. Comprehensive Organic Synthesis, Trost, B.; Fleming, I., Eds.; Pergamon: 1991, 2, 1.
    • (1989) Angew. Chem. Int. Ed. Engl. , vol.28 , pp. 38
    • Oppolzer, W.1
  • 64
    • 0000784042 scopus 로고
    • Trost, B.; Fleming, I., Eds.; Pergamon
    • Courtois, G.; Masson, A.; Miginiac, L. C.R. Acad. Sci. Paris, Série C 1978, 256, 265. Van der Louw, J.; Van der Baan, J.L.; Stieltjes, H.; Bickelhaupt, F.; Klumpp, G.M. Tetrahedron Lett. 1987, 28, 5929. Oppolzer, W. Angew. Chem. Int. Ed. Engl. 1989, 28, 38. Oppolzer, W. Comprehensive Organic Synthesis, Trost, B.; Fleming, I., Eds.; Pergamon: 1991, 5, pp 28-61. Roush, W. Comprehensive Organic Synthesis, Trost, B.; Fleming, I., Eds.; Pergamon: 1991, 2, 1.
    • (1991) Comprehensive Organic Synthesis , vol.5 , pp. 28-61
    • Oppolzer, W.1
  • 65
    • 0002446724 scopus 로고
    • Trost, B.; Fleming, I., Eds.; Pergamon
    • Courtois, G.; Masson, A.; Miginiac, L. C.R. Acad. Sci. Paris, Série C 1978, 256, 265. Van der Louw, J.; Van der Baan, J.L.; Stieltjes, H.; Bickelhaupt, F.; Klumpp, G.M. Tetrahedron Lett. 1987, 28, 5929. Oppolzer, W. Angew. Chem. Int. Ed. Engl. 1989, 28, 38. Oppolzer, W. Comprehensive Organic Synthesis, Trost, B.; Fleming, I., Eds.; Pergamon: 1991, 5, pp 28-61. Roush, W. Comprehensive Organic Synthesis, Trost, B.; Fleming, I., Eds.; Pergamon: 1991, 2, 1.
    • (1991) Comprehensive Organic Synthesis , vol.2 , pp. 1
    • Roush, W.1
  • 66
    • 84889541583 scopus 로고
    • Thèse de Doctorat d'Etat ès Sciences Physiques, UPMC, Paris, France
    • Frangin, Y., Thèse de Doctorat d'Etat ès Sciences Physiques, UPMC, Paris, France 1979.
    • (1979)
    • Frangin, Y.1
  • 68
    • 84889523265 scopus 로고    scopus 로고
    • note
    • Crotylzinc bromide was used instead of allylzinc bromide in order to prevent the double addition, already described in Scheme 4.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.