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Volumn 41, Issue 4, 2000, Pages 515-519

The preparation of resin-bound nitroalkenes and some applications in high pressure promoted cycloadditions

Author keywords

High pressure promoted cycloadditions; Microwave heating; Nitroalkenes; Solid phase synthesis

Indexed keywords

ALKENE; NITROALKENE; UNCLASSIFIED DRUG;

EID: 0034700858     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0040-4039(99)02108-5     Document Type: Article
Times cited : (67)

References (32)
  • 7
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    • Note
    • 2 (310 mL) and dried for at least 2 h at 70°C in vacuum (1 mm Hg). The use of DCC is not recommended because of the problematic removal of the (poorly soluble) DCU side product from the resin.
  • 8
    • 84992609526 scopus 로고    scopus 로고
    • Note
    • 2 (3x10 mL) and dried for at least 2 h at 70°C in vacuum (1 mm Hg).
  • 9
    • 0002307546 scopus 로고
    • For solid phase Diels-Alder reactions, see: (a)
    • For solid phase Diels-Alder reactions, see: (a) Gaviña, F.; Gil, P.; Palazón, B. Tetrahedron Lett. 1979, 15, 1333-1336. (b) Yedida, V.; Leznoff, C. Can. J. Chem. 1980, 58, 1144-1150. © Schlessinger, R. H.; Bergstrom, C. P. Tetrahedron Lett. 1996, 37, 2133-2136. (d) Tietze, L. F.; Hippe, T.; Steinmetz, A. Synlett 1996, 1043-1044. (e) Wang, Y.; Wilson, S. R. Tetrahedron Lett. 1997, 38, 4021-4024. (f) Crawshaw, M.; Hird, N. W.; Irie, K.; Nagai, K. Tetrahedron Lett. 1997, 38, 7115-7118. (g) Winkler, J. D.; McCoull, W. Tetrahedron Lett. 1998, 39, 4935-4938. (h) Wendeborn, S.; Mesmeaker, A. D.; Brill, W. K.-D. Synlett 1998, 865-868. (i) Smith, E. M. Tetrahedron Lett. 1999, 40, 3285-3288. (j) Chen, C.; Munoz, B. Tetrahedron Lett. 1999, 40, 3491-3494. (k) Craig, D.; Robson, M. J.; Shaw, S. J. Synlett 1998, 1381-1383. (l) Sparey, T. J.; Harrison, T. Tetrahedron Lett. 1998, 39, 5873-5874. (m) Winkler, J. D.; Kwak, Y. S. J. Org. Chem. 1998, 63, 8634-8635.
    • (1979) Tetrahedron Lett. , vol.15 , pp. 1333-1336
    • Gaviña, F.1    Gil, P.2    Palazón, B.3
  • 10
    • 0000021185 scopus 로고
    • (b)
    • For solid phase Diels-Alder reactions, see: (a) Gaviña, F.; Gil, P.; Palazón, B. Tetrahedron Lett. 1979, 15, 1333-1336. (b) Yedida, V.; Leznoff, C. Can. J. Chem. 1980, 58, 1144-1150. © Schlessinger, R. H.; Bergstrom, C. P. Tetrahedron Lett. 1996, 37, 2133-2136. (d) Tietze, L. F.; Hippe, T.; Steinmetz, A. Synlett 1996, 1043-1044. (e) Wang, Y.; Wilson, S. R. Tetrahedron Lett. 1997, 38, 4021-4024. (f) Crawshaw, M.; Hird, N. W.; Irie, K.; Nagai, K. Tetrahedron Lett. 1997, 38, 7115-7118. (g) Winkler, J. D.; McCoull, W. Tetrahedron Lett. 1998, 39, 4935-4938. (h) Wendeborn, S.; Mesmeaker, A. D.; Brill, W. K.-D. Synlett 1998, 865-868. (i) Smith, E. M. Tetrahedron Lett. 1999, 40, 3285-3288. (j) Chen, C.; Munoz, B. Tetrahedron Lett. 1999, 40, 3491-3494. (k) Craig, D.; Robson, M. J.; Shaw, S. J. Synlett 1998, 1381-1383. (l) Sparey, T. J.; Harrison, T. Tetrahedron Lett. 1998, 39, 5873-5874. (m) Winkler, J. D.; Kwak, Y. S. J. Org. Chem. 1998, 63, 8634-8635.
    • (1980) Can. J. Chem. , vol.58 , pp. 1144-1150
    • Yedida, V.1    Leznoff, C.2
  • 11
    • 0029879258 scopus 로고    scopus 로고
    • ©
    • For solid phase Diels-Alder reactions, see: (a) Gaviña, F.; Gil, P.; Palazón, B. Tetrahedron Lett. 1979, 15, 1333-1336. (b) Yedida, V.; Leznoff, C. Can. J. Chem. 1980, 58, 1144-1150. © Schlessinger, R. H.; Bergstrom, C. P. Tetrahedron Lett. 1996, 37, 2133-2136. (d) Tietze, L. F.; Hippe, T.; Steinmetz, A. Synlett 1996, 1043-1044. (e) Wang, Y.; Wilson, S. R. Tetrahedron Lett. 1997, 38, 4021-4024. (f) Crawshaw, M.; Hird, N. W.; Irie, K.; Nagai, K. Tetrahedron Lett. 1997, 38, 7115-7118. (g) Winkler, J. D.; McCoull, W. Tetrahedron Lett. 1998, 39, 4935-4938. (h) Wendeborn, S.; Mesmeaker, A. D.; Brill, W. K.-D. Synlett 1998, 865-868. (i) Smith, E. M. Tetrahedron Lett. 1999, 40, 3285-3288. (j) Chen, C.; Munoz, B. Tetrahedron Lett. 1999, 40, 3491-3494. (k) Craig, D.; Robson, M. J.; Shaw, S. J. Synlett 1998, 1381-1383. (l) Sparey, T. J.; Harrison, T. Tetrahedron Lett. 1998, 39, 5873-5874. (m) Winkler, J. D.; Kwak, Y. S. J. Org. Chem. 1998, 63, 8634-8635.
    • (1996) Tetrahedron Lett. , vol.37 , pp. 2133-2136
    • Schlessinger, R.H.1    Bergstrom, C.P.2
  • 12
    • 1542710212 scopus 로고    scopus 로고
    • (d)
    • For solid phase Diels-Alder reactions, see: (a) Gaviña, F.; Gil, P.; Palazón, B. Tetrahedron Lett. 1979, 15, 1333-1336. (b) Yedida, V.; Leznoff, C. Can. J. Chem. 1980, 58, 1144-1150. © Schlessinger, R. H.; Bergstrom, C. P. Tetrahedron Lett. 1996, 37, 2133-2136. (d) Tietze, L. F.; Hippe, T.; Steinmetz, A. Synlett 1996, 1043-1044. (e) Wang, Y.; Wilson, S. R. Tetrahedron Lett. 1997, 38, 4021-4024. (f) Crawshaw, M.; Hird, N. W.; Irie, K.; Nagai, K. Tetrahedron Lett. 1997, 38, 7115-7118. (g) Winkler, J. D.; McCoull, W. Tetrahedron Lett. 1998, 39, 4935-4938. (h) Wendeborn, S.; Mesmeaker, A. D.; Brill, W. K.-D. Synlett 1998, 865-868. (i) Smith, E. M. Tetrahedron Lett. 1999, 40, 3285-3288. (j) Chen, C.; Munoz, B. Tetrahedron Lett. 1999, 40, 3491-3494. (k) Craig, D.; Robson, M. J.; Shaw, S. J. Synlett 1998, 1381-1383. (l) Sparey, T. J.; Harrison, T. Tetrahedron Lett. 1998, 39, 5873-5874. (m) Winkler, J. D.; Kwak, Y. S. J. Org. Chem. 1998, 63, 8634-8635.
    • (1996) Synlett , pp. 1043-1044
    • Tietze, L.F.1    Hippe, T.2    Steinmetz, A.3
  • 13
    • 0030921272 scopus 로고    scopus 로고
    • (e)
    • For solid phase Diels-Alder reactions, see: (a) Gaviña, F.; Gil, P.; Palazón, B. Tetrahedron Lett. 1979, 15, 1333-1336. (b) Yedida, V.; Leznoff, C. Can. J. Chem. 1980, 58, 1144-1150. © Schlessinger, R. H.; Bergstrom, C. P. Tetrahedron Lett. 1996, 37, 2133-2136. (d) Tietze, L. F.; Hippe, T.; Steinmetz, A. Synlett 1996, 1043-1044. (e) Wang, Y.; Wilson, S. R. Tetrahedron Lett. 1997, 38, 4021-4024. (f) Crawshaw, M.; Hird, N. W.; Irie, K.; Nagai, K. Tetrahedron Lett. 1997, 38, 7115-7118. (g) Winkler, J. D.; McCoull, W. Tetrahedron Lett. 1998, 39, 4935-4938. (h) Wendeborn, S.; Mesmeaker, A. D.; Brill, W. K.-D. Synlett 1998, 865-868. (i) Smith, E. M. Tetrahedron Lett. 1999, 40, 3285-3288. (j) Chen, C.; Munoz, B. Tetrahedron Lett. 1999, 40, 3491-3494. (k) Craig, D.; Robson, M. J.; Shaw, S. J. Synlett 1998, 1381-1383. (l) Sparey, T. J.; Harrison, T. Tetrahedron Lett. 1998, 39, 5873-5874. (m) Winkler, J. D.; Kwak, Y. S. J. Org. Chem. 1998, 63, 8634-8635.
    • (1997) Tetrahedron Lett. , vol.38 , pp. 4021-4024
    • Wang, Y.1    Wilson, S.R.2
  • 14
    • 0030881340 scopus 로고    scopus 로고
    • (f)
    • For solid phase Diels-Alder reactions, see: (a) Gaviña, F.; Gil, P.; Palazón, B. Tetrahedron Lett. 1979, 15, 1333-1336. (b) Yedida, V.; Leznoff, C. Can. J. Chem. 1980, 58, 1144-1150. © Schlessinger, R. H.; Bergstrom, C. P. Tetrahedron Lett. 1996, 37, 2133-2136. (d) Tietze, L. F.; Hippe, T.; Steinmetz, A. Synlett 1996, 1043-1044. (e) Wang, Y.; Wilson, S. R. Tetrahedron Lett. 1997, 38, 4021-4024. (f) Crawshaw, M.; Hird, N. W.; Irie, K.; Nagai, K. Tetrahedron Lett. 1997, 38, 7115-7118. (g) Winkler, J. D.; McCoull, W. Tetrahedron Lett. 1998, 39, 4935-4938. (h) Wendeborn, S.; Mesmeaker, A. D.; Brill, W. K.-D. Synlett 1998, 865-868. (i) Smith, E. M. Tetrahedron Lett. 1999, 40, 3285-3288. (j) Chen, C.; Munoz, B. Tetrahedron Lett. 1999, 40, 3491-3494. (k) Craig, D.; Robson, M. J.; Shaw, S. J. Synlett 1998, 1381-1383. (l) Sparey, T. J.; Harrison, T. Tetrahedron Lett. 1998, 39, 5873-5874. (m) Winkler, J. D.; Kwak, Y. S. J. Org. Chem. 1998, 63, 8634-8635.
    • (1997) Tetrahedron Lett. , vol.38 , pp. 7115-7118
    • Crawshaw, M.1    Hird, N.W.2    Irie, K.3    Nagai, K.4
  • 15
    • 0032500099 scopus 로고    scopus 로고
    • (g)
    • For solid phase Diels-Alder reactions, see: (a) Gaviña, F.; Gil, P.; Palazón, B. Tetrahedron Lett. 1979, 15, 1333-1336. (b) Yedida, V.; Leznoff, C. Can. J. Chem. 1980, 58, 1144-1150. © Schlessinger, R. H.; Bergstrom, C. P. Tetrahedron Lett. 1996, 37, 2133-2136. (d) Tietze, L. F.; Hippe, T.; Steinmetz, A. Synlett 1996, 1043-1044. (e) Wang, Y.; Wilson, S. R. Tetrahedron Lett. 1997, 38, 4021-4024. (f) Crawshaw, M.; Hird, N. W.; Irie, K.; Nagai, K. Tetrahedron Lett. 1997, 38, 7115-7118. (g) Winkler, J. D.; McCoull, W. Tetrahedron Lett. 1998, 39, 4935-4938. (h) Wendeborn, S.; Mesmeaker, A. D.; Brill, W. K.-D. Synlett 1998, 865-868. (i) Smith, E. M. Tetrahedron Lett. 1999, 40, 3285-3288. (j) Chen, C.; Munoz, B. Tetrahedron Lett. 1999, 40, 3491-3494. (k) Craig, D.; Robson, M. J.; Shaw, S. J. Synlett 1998, 1381-1383. (l) Sparey, T. J.; Harrison, T. Tetrahedron Lett. 1998, 39, 5873-5874. (m) Winkler, J. D.; Kwak, Y. S. J. Org. Chem. 1998, 63, 8634-8635.
    • (1998) Tetrahedron Lett. , vol.39 , pp. 4935-4938
    • Winkler, J.D.1    McCoull, W.2
  • 16
    • 0001247793 scopus 로고    scopus 로고
    • (h)
    • For solid phase Diels-Alder reactions, see: (a) Gaviña, F.; Gil, P.; Palazón, B. Tetrahedron Lett. 1979, 15, 1333-1336. (b) Yedida, V.; Leznoff, C. Can. J. Chem. 1980, 58, 1144-1150. © Schlessinger, R. H.; Bergstrom, C. P. Tetrahedron Lett. 1996, 37, 2133-2136. (d) Tietze, L. F.; Hippe, T.; Steinmetz, A. Synlett 1996, 1043-1044. (e) Wang, Y.; Wilson, S. R. Tetrahedron Lett. 1997, 38, 4021-4024. (f) Crawshaw, M.; Hird, N. W.; Irie, K.; Nagai, K. Tetrahedron Lett. 1997, 38, 7115-7118. (g) Winkler, J. D.; McCoull, W. Tetrahedron Lett. 1998, 39, 4935-4938. (h) Wendeborn, S.; Mesmeaker, A. D.; Brill, W. K.-D. Synlett 1998, 865-868. (i) Smith, E. M. Tetrahedron Lett. 1999, 40, 3285-3288. (j) Chen, C.; Munoz, B. Tetrahedron Lett. 1999, 40, 3491-3494. (k) Craig, D.; Robson, M. J.; Shaw, S. J. Synlett 1998, 1381-1383. (l) Sparey, T. J.; Harrison, T. Tetrahedron Lett. 1998, 39, 5873-5874. (m) Winkler, J. D.; Kwak, Y. S. J. Org. Chem. 1998, 63, 8634-8635.
    • (1998) Synlett , pp. 865-868
    • Wendeborn, S.1    Mesmeaker, A.D.2    Brill, W.K.-D.3
  • 17
    • 0033597375 scopus 로고    scopus 로고
    • (i)
    • For solid phase Diels-Alder reactions, see: (a) Gaviña, F.; Gil, P.; Palazón, B. Tetrahedron Lett. 1979, 15, 1333-1336. (b) Yedida, V.; Leznoff, C. Can. J. Chem. 1980, 58, 1144-1150. © Schlessinger, R. H.; Bergstrom, C. P. Tetrahedron Lett. 1996, 37, 2133-2136. (d) Tietze, L. F.; Hippe, T.; Steinmetz, A. Synlett 1996, 1043-1044. (e) Wang, Y.; Wilson, S. R. Tetrahedron Lett. 1997, 38, 4021-4024. (f) Crawshaw, M.; Hird, N. W.; Irie, K.; Nagai, K. Tetrahedron Lett. 1997, 38, 7115-7118. (g) Winkler, J. D.; McCoull, W. Tetrahedron Lett. 1998, 39, 4935-4938. (h) Wendeborn, S.; Mesmeaker, A. D.; Brill, W. K.-D. Synlett 1998, 865-868. (i) Smith, E. M. Tetrahedron Lett. 1999, 40, 3285-3288. (j) Chen, C.; Munoz, B. Tetrahedron Lett. 1999, 40, 3491-3494. (k) Craig, D.; Robson, M. J.; Shaw, S. J. Synlett 1998, 1381-1383. (l) Sparey, T. J.; Harrison, T. Tetrahedron Lett. 1998, 39, 5873-5874. (m) Winkler, J. D.; Kwak, Y. S. J. Org. Chem. 1998, 63, 8634-8635.
    • (1999) Tetrahedron Lett. , vol.40 , pp. 3285-3288
    • Smith, E.M.1
  • 18
    • 0033617326 scopus 로고    scopus 로고
    • (j)
    • For solid phase Diels-Alder reactions, see: (a) Gaviña, F.; Gil, P.; Palazón, B. Tetrahedron Lett. 1979, 15, 1333-1336. (b) Yedida, V.; Leznoff, C. Can. J. Chem. 1980, 58, 1144-1150. © Schlessinger, R. H.; Bergstrom, C. P. Tetrahedron Lett. 1996, 37, 2133-2136. (d) Tietze, L. F.; Hippe, T.; Steinmetz, A. Synlett 1996, 1043-1044. (e) Wang, Y.; Wilson, S. R. Tetrahedron Lett. 1997, 38, 4021-4024. (f) Crawshaw, M.; Hird, N. W.; Irie, K.; Nagai, K. Tetrahedron Lett. 1997, 38, 7115-7118. (g) Winkler, J. D.; McCoull, W. Tetrahedron Lett. 1998, 39, 4935-4938. (h) Wendeborn, S.; Mesmeaker, A. D.; Brill, W. K.-D. Synlett 1998, 865-868. (i) Smith, E. M. Tetrahedron Lett. 1999, 40, 3285-3288. (j) Chen, C.; Munoz, B. Tetrahedron Lett. 1999, 40, 3491-3494. (k) Craig, D.; Robson, M. J.; Shaw, S. J. Synlett 1998, 1381-1383. (l) Sparey, T. J.; Harrison, T. Tetrahedron Lett. 1998, 39, 5873-5874. (m) Winkler, J. D.; Kwak, Y. S. J. Org. Chem. 1998, 63, 8634-8635.
    • (1999) Tetrahedron Lett. , vol.40 , pp. 3491-3494
    • Chen, C.1    Munoz, B.2
  • 19
    • 0002424946 scopus 로고    scopus 로고
    • (k)
    • For solid phase Diels-Alder reactions, see: (a) Gaviña, F.; Gil, P.; Palazón, B. Tetrahedron Lett. 1979, 15, 1333-1336. (b) Yedida, V.; Leznoff, C. Can. J. Chem. 1980, 58, 1144-1150. © Schlessinger, R. H.; Bergstrom, C. P. Tetrahedron Lett. 1996, 37, 2133-2136. (d) Tietze, L. F.; Hippe, T.; Steinmetz, A. Synlett 1996, 1043-1044. (e) Wang, Y.; Wilson, S. R. Tetrahedron Lett. 1997, 38, 4021-4024. (f) Crawshaw, M.; Hird, N. W.; Irie, K.; Nagai, K. Tetrahedron Lett. 1997, 38, 7115-7118. (g) Winkler, J. D.; McCoull, W. Tetrahedron Lett. 1998, 39, 4935-4938. (h) Wendeborn, S.; Mesmeaker, A. D.; Brill, W. K.-D. Synlett 1998, 865-868. (i) Smith, E. M. Tetrahedron Lett. 1999, 40, 3285-3288. (j) Chen, C.; Munoz, B. Tetrahedron Lett. 1999, 40, 3491-3494. (k) Craig, D.; Robson, M. J.; Shaw, S. J. Synlett 1998, 1381-1383. (l) Sparey, T. J.; Harrison, T. Tetrahedron Lett. 1998, 39, 5873-5874. (m) Winkler, J. D.; Kwak, Y. S. J. Org. Chem. 1998, 63, 8634-8635.
    • (1998) Synlett , pp. 1381-1383
    • Craig, D.1    Robson, M.J.2    Shaw, S.J.3
  • 20
    • 0032490889 scopus 로고    scopus 로고
    • (l)
    • For solid phase Diels-Alder reactions, see: (a) Gaviña, F.; Gil, P.; Palazón, B. Tetrahedron Lett. 1979, 15, 1333-1336. (b) Yedida, V.; Leznoff, C. Can. J. Chem. 1980, 58, 1144-1150. © Schlessinger, R. H.; Bergstrom, C. P. Tetrahedron Lett. 1996, 37, 2133-2136. (d) Tietze, L. F.; Hippe, T.; Steinmetz, A. Synlett 1996, 1043-1044. (e) Wang, Y.; Wilson, S. R. Tetrahedron Lett. 1997, 38, 4021-4024. (f) Crawshaw, M.; Hird, N. W.; Irie, K.; Nagai, K. Tetrahedron Lett. 1997, 38, 7115-7118. (g) Winkler, J. D.; McCoull, W. Tetrahedron Lett. 1998, 39, 4935-4938. (h) Wendeborn, S.; Mesmeaker, A. D.; Brill, W. K.-D. Synlett 1998, 865-868. (i) Smith, E. M. Tetrahedron Lett. 1999, 40, 3285-3288. (j) Chen, C.; Munoz, B. Tetrahedron Lett. 1999, 40, 3491-3494. (k) Craig, D.; Robson, M. J.; Shaw, S. J. Synlett 1998, 1381-1383. (l) Sparey, T. J.; Harrison, T. Tetrahedron Lett. 1998, 39, 5873-5874. (m) Winkler, J. D.; Kwak, Y. S. J. Org. Chem. 1998, 63, 8634-8635.
    • (1998) Tetrahedron Lett. , vol.39 , pp. 5873-5874
    • Sparey, T.J.1    Harrison, T.2
  • 21
    • 0031767569 scopus 로고    scopus 로고
    • (m)
    • For solid phase Diels-Alder reactions, see: (a) Gaviña, F.; Gil, P.; Palazón, B. Tetrahedron Lett. 1979, 15, 1333-1336. (b) Yedida, V.; Leznoff, C. Can. J. Chem. 1980, 58, 1144-1150. © Schlessinger, R. H.; Bergstrom, C. P. Tetrahedron Lett. 1996, 37, 2133-2136. (d) Tietze, L. F.; Hippe, T.; Steinmetz, A. Synlett 1996, 1043-1044. (e) Wang, Y.; Wilson, S. R. Tetrahedron Lett. 1997, 38, 4021-4024. (f) Crawshaw, M.; Hird, N. W.; Irie, K.; Nagai, K. Tetrahedron Lett. 1997, 38, 7115-7118. (g) Winkler, J. D.; McCoull, W. Tetrahedron Lett. 1998, 39, 4935-4938. (h) Wendeborn, S.; Mesmeaker, A. D.; Brill, W. K.-D. Synlett 1998, 865-868. (i) Smith, E. M. Tetrahedron Lett. 1999, 40, 3285-3288. (j) Chen, C.; Munoz, B. Tetrahedron Lett. 1999, 40, 3491-3494. (k) Craig, D.; Robson, M. J.; Shaw, S. J. Synlett 1998, 1381-1383. (l) Sparey, T. J.; Harrison, T. Tetrahedron Lett. 1998, 39, 5873-5874. (m) Winkler, J. D.; Kwak, Y. S. J. Org. Chem. 1998, 63, 8634-8635.
    • (1998) J. Org. Chem. , vol.63 , pp. 8634-8635
    • Winkler, J.D.1    Kwak, Y.S.2
  • 22
    • 0001096447 scopus 로고    scopus 로고
    • Note
    • 2 (3×10 mL). The resin was dried at 70°C under reduced pressure for at least 2 h. The increase in weight of the resin was a measure of the amount of cycloadduct formed on the resin. The use of high pressure was prefered over refluxing in toluene in view of shorter reaction times and higher yields. 4-Methoxybenzyl (E/Z)-2-nitro-3-phenyl-2-propenoate reacted with 2,3-dimethylbutadiene in refluxing toluene for 48 h yielding 73% of cycloadduct; at 15 kbar and room temperature (18 h) the yield was 91%.
  • 23
    • 84992558066 scopus 로고    scopus 로고
    • Note
    • 1H NMR and mass spectroscopy. The overall yield starting from the Wang resin was 41%.
  • 26
    • 37049066779 scopus 로고
    • The cis-relationship between the amide and phenyl substituents on the cyclohexene ring agrees with the corresponding coupling constants between the adjacent protons (2.5 Hz in cis-7 and 10.5 Hz in trans-7). Compare
    • The cis-relationship between the amide and phenyl substituents on the cyclohexene ring agrees with the corresponding coupling constants between the adjacent protons (2.5 Hz in cis-7 and 10.5 Hz in trans-7). Compare: Serrano, J. A.; Cáceres, L. E.; Roman, E. J. Chem. Soc., Perkin. Trans. 1 1995, 1863-1871.
    • (1995) J. Chem. Soc., Perkin. Trans. , vol.1 , pp. 1863-1871
    • Serrano, J.A.1    Cáceres, L.E.2    Roman, E.3
  • 27
    • 84992660041 scopus 로고    scopus 로고
    • Note
    • 3:MeOH=10:1 with 1% AcOH) the amino alcohol 9 was isolated as a mixture of two diastereomers in 25% overall yield from resin coupling of 1.
  • 30
    • 84992610264 scopus 로고    scopus 로고
    • Note
    • 2 as the solvent. The reaction was performed at a pressure of 15 kbar for 20 h at 50°C. See Ref.10.
  • 31
    • 84992618779 scopus 로고    scopus 로고
    • Note
    • 1H NMR and mass spectroscopy.
  • 32
    • 84992616871 scopus 로고    scopus 로고
    • Note
    • 3) Characteristics of product 13a-e; acetal proton (EtOCHRONO) 4.89-5.10 ppm; benzylic proton (ONOCHRPh) 5.72-5.88 ppm. Mass analysis characteristics of products 13a-e; 13a HRMS (rel. int.) m/e: 356 (M+1, 0.05), 309 (-HOEt, 2.24), 279 (97.8); 13b HRMS (rel. int.) m/e: 357 (M+1, 0.00), 310 (-HOEt, 2.13), 280 (24.2); 13c HRMS (rel. int.) m/e: 345 (M+1, 0.00), 298 (-HOEt, 2.37), 268 (13.1); 13d HRMS (rel. int.) m/e: 346 (M+1, 11.5), 299 (-HOEt, 36.7), 269 (55.1); 13e HRMS (rel.int) m/e: 322 (M+1, 1.59), 275 (-HOEt, 21.7), 245 (56.0).


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