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1
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0030472392
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Part XLIX of Synthesis of Erythrina and Related Alkaloids. Part XLVI: S. Hosoi
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Part XLIX of Synthesis of Erythrina and Related Alkaloids. Part XLVI: S. Hosoi, T. Sato, M. Nagao and Y. Tsuda, Chem. Pharm. Bull., 1996,44,2342.
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(1996)
Chem. Pharm. Bull.
, vol.44
, pp. 2342
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Sato, T.1
Nagao, M.2
Tsuda, Y.3
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2
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18844459373
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A part of the present work was communicated in that paper. Part XLVIII
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A part of the present work was communicated in that paper. Part XLVIII: J. Toda, Y. Niimura, T. Sano and Y. Tsuda, Heterocycles, 1998,48, 1599.
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(1998)
Heterocycles
, vol.48
, pp. 1599
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Toda, J.1
Niimura, Y.2
Sano, T.3
Tsuda, Y.4
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3
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0000423958
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Erythrina and Related Alkaloids
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ed. G. A. Cordeil, Academic Press, New York
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For review, see, Y. Tsuda and T. Sano, Erythrina and Related Alkaloids, in The Alkaloids, ed. G. A. Cordeil, Academic Press, New York, 1980, vol. 48, p. 249.
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(1980)
The Alkaloids
, vol.48
, pp. 249
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Tsuda, Y.1
Sano, T.2
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5
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37049123961
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(b) D. H. R. Barton, A. A. L. Gunatilaka, R. M. Letcher, A. M. F. T. Lobo and D. A. Widdowson, J. Chem. Soc., Perkin Trans. 1,1973,874;
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(1973)
J. Chem. Soc., Perkin Trans. 1
, vol.874
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Barton, D.H.R.1
Gunatilaka, A.A.L.2
Letcher, R.M.3
Lobo, A.M.F.4
Widdowson, D.A.5
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6
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0017539160
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I. Barakat, A. M. Jackson and M. I. Abdulla, Lloydia, 1977,40,471.
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(1977)
Lloydia
, vol.40
, pp. 471
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Barakat, I.1
Jackson, A.M.2
Abdulla, M.I.3
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7
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0023115272
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(a) T. Sano, J. Toda, N. Kashiwaba, T. Ohshima and Y. Tsuda, Chem. Pharm. Bull., 1987,35,479;
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(1987)
Chem. Pharm. Bull.
, vol.35
, pp. 479
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Sano, T.1
Toda, J.2
Kashiwaba, N.3
Ohshima, T.4
Tsuda, Y.5
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8
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0025879106
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(b) Y. Tsuda, S. Hosoi, A. Nakai, Y. Sakai, T. Abe, Y. Ishi, F. Kiuchi and T. Sano, Chem. Pharm. Bull., 1991, 39, 1365;
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(1991)
Chem. Pharm. Bull.
, vol.39
, pp. 1365
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Tsuda, Y.1
Hosoi, S.2
Nakai, A.3
Sakai, Y.4
Abe, T.5
Ishi, Y.6
Kiuchi, F.7
Sano, T.8
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9
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0026625775
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T. Sano, J. Toda, T. Ohshima and Y. Tsuda, Chem. Pharm. Bull., 1992,40, 873.
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(1992)
Chem. Pharm. Bull.
, vol.40
, pp. 873
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Sano, T.1
Toda, J.2
Ohshima, T.3
Tsuda, Y.4
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10
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0000144235
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(a) Y. Tsuda, A. Nakai, K. Ito, F. Suzuki and M. Haruna, Helerocycles, 1984, 22, 1817;
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(1984)
Helerocycles
, vol.22
, pp. 1817
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Tsuda, Y.1
Nakai, A.2
Ito, K.3
Suzuki, F.4
Haruna, M.5
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11
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0024995259
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(b) Y. Tsuda, Y. Sakai, A. Nakai, M. Kaneko, Y. Ishieuro, K. Isobe, J. Taea and T. Sano, Client. Pharm. Bull., 1990,38, 1462.
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(1990)
Client. Pharm. Bull.
, vol.38
, pp. 1462
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Tsuda, Y.1
Sakai, Y.2
Nakai, A.3
Kaneko, M.4
Ishieuro, Y.5
Isobe, K.6
Taea, J.7
Sano, T.8
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12
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33645912671
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2,4a
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2,4a
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13
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33645940674
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3, the yield of 4 was reduced to 49% with formation of an unidentified over-oxidation product
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3, the yield of 4 was reduced to 49% with formation of an unidentified over-oxidation product.
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14
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33645953384
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Attempted oxidations of 10 with oxone and hydrogen peroxide-urea complex also were unsuccessful, and gave only recovered starting material or a profoundly decomposed mixture
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Attempted oxidations of 10 with oxone and hydrogen peroxide-urea complex also were unsuccessful, and gave only recovered starting material or a profoundly decomposed mixture.
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16
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0027753912
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1H NMR spectrum of 7 supported the optimized structure (Fig. 1), see Y. Tsuda, S. Hosoi, N. Kataciri, C. Kaneko and T. Sano, Client. Pharm. Bull, 1993,41,2087.
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(1993)
Client. Pharm. Bull
, vol.41
, pp. 2087
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Tsuda, Y.1
Hosoi, S.2
Kataciri, N.3
Kaneko, C.4
Sano, T.5
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17
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33645912410
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Semi-empirical molecular orbital calculations were performed with AMI implemented in CAChe Ver.3.6 for Apple Macintosh, SONY-Tektronix Co. Ltd, Tokyo, Japan.
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Semi-empirical molecular orbital calculations were performed with AMI implemented in CAChe Ver.3.6 for Apple Macintosh, SONY-Tektronix Co. Ltd, Tokyo, Japan.
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18
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0001479478
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For assignment of proton signals in erythrinan alkaloids, see ref. 2 and also Y. Tsuda, S. Hosoi, T. Sano, H. Suzuki and J. Toda, Heterocycles, 1993, 36, 655.
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(1993)
Heterocycles
, vol.36
, pp. 655
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Tsuda, A.Y.1
Hosoi, S.2
Sano, T.3
Suzuki, H.4
Toda, J.5
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22
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0028883110
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(b) M. Tanicuchi, H. Fujii, K. Oshima and K. Uchimoto, Tetrahedron, 1995,51,679.
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(1995)
Tetrahedron
, vol.51
, pp. 679
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Tanicuchi, M.1
Fujii, H.2
Oshima, K.3
Uchimoto, K.4
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24
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33645937067
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Methylation did not proceed in the absence of Bu4NHSO4.
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Methylation did not proceed in the absence of Bu4NHSO4.
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25
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0037629474
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(a) G. A. Molander, B. E. La Belle and G. Hahn, J. Org. Client., 1986, 51, 5259;
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(1986)
J. Org. Client.
, vol.51
, pp. 5259
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Molander, G.A.1
La Belle, B.E.2
Hahn, G.3
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27
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0000730222
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T. Sano, J. Toda and Y. Tsuda, Heterocycles, 1982,18, 229.
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(1982)
Heterocycles
, vol.18
, pp. 229
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Sano, T.1
Toda, J.2
Tsuda, Y.3
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28
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33645933673
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This synthesis gave, at the same time, a firm proof of configurations at C-2 and C-3 of (+)-erythratidine, since they had previously been elucidated only from the coupling constant between H-2 and H-3.
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This synthesis gave, at the same time, a firm proof of configurations at C-2 and C-3 of (+)-erythratidine, since they had previously been elucidated only from the coupling constant between H-2 and H-3.
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