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1
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0021921867
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Hoffmann, H. M. R.; Rabe, J., Angew. Chem., Int. Ed. Engl. 1985, 24, 94-116; Hausen, B. M., Deutsch. Apoth. Ztg. 1991, 131, 987-995.
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(1985)
Angew. Chem., Int. Ed. Engl.
, vol.24
, pp. 94-116
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Hoffmann, H.M.R.1
Rabe, J.2
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2
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0025881854
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Hoffmann, H. M. R.; Rabe, J., Angew. Chem., Int. Ed. Engl. 1985, 24, 94-116; Hausen, B. M., Deutsch. Apoth. Ztg. 1991, 131, 987-995.
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(1991)
Deutsch. Apoth. Ztg.
, vol.131
, pp. 987-995
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Hausen, B.M.1
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3
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0015165481
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Kupchan, S. M.; Eakin, M. A.; Thomas, A. M., J. Med. Chem. 1971, 14, 1147-1152.
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(1971)
J. Med. Chem.
, vol.14
, pp. 1147-1152
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Kupchan, S.M.1
Eakin, M.A.2
Thomas, A.M.3
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5
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84943951379
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Iino, Y.; Tanako, A.; Yamashita, K., Agric. Biol. Chem. 1972, 36, 2505-2509.
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(1972)
Agric. Biol. Chem.
, vol.36
, pp. 2505-2509
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Iino, Y.1
Tanako, A.2
Yamashita, K.3
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9
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-
0000404656
-
-
Enantioselectivity by intermediary diastereoselection using optical pure sulfoxides has been reported to furnish α-methylene-γ-butyrolactones with high ee's, cf Bravo, P.; Resnati, G.; Viani, F., Tetrahedron Lett. 1985, 26, 2913-2916.
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(1985)
Tetrahedron Lett.
, vol.26
, pp. 2913-2916
-
-
Bravo, P.1
Resnati, G.2
Viani, F.3
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10
-
-
0023938379
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-
However, inductions have been observed upon using chiral carbonyl compounds, cf. Csuk, R.; Hugener, M.; Vasella, A., Helv. Chim. Acta 1988, 71, 609-618; Csuk, R.; Glänzer, B. I.; Hu, Z.; Boese, R., Tetrahedron 1994, 50, 1111-1124; Csuk, R.; Fürstner A.; Weidmann, H., J. Carbohydr. Chem. 1987, 6, 459-467.
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(1988)
Helv. Chim. Acta
, vol.71
, pp. 609-618
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-
Csuk, R.1
Hugener, M.2
Vasella, A.3
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11
-
-
0028011902
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-
However, inductions have been observed upon using chiral carbonyl compounds, cf. Csuk, R.; Hugener, M.; Vasella, A., Helv. Chim. Acta 1988, 71, 609-618; Csuk, R.; Glänzer, B. I.; Hu, Z.; Boese, R., Tetrahedron 1994, 50, 1111-1124; Csuk, R.; Fürstner A.; Weidmann, H., J. Carbohydr. Chem. 1987, 6, 459-467.
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(1994)
Tetrahedron
, vol.50
, pp. 1111-1124
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-
Csuk, R.1
Glänzer, B.I.2
Hu, Z.3
Boese, R.4
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12
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-
0023938379
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-
However, inductions have been observed upon using chiral carbonyl compounds, cf. Csuk, R.; Hugener, M.; Vasella, A., Helv. Chim. Acta 1988, 71, 609-618; Csuk, R.; Glänzer, B. I.; Hu, Z.; Boese, R., Tetrahedron 1994, 50, 1111-1124; Csuk, R.; Fürstner A.; Weidmann, H., J. Carbohydr. Chem. 1987, 6, 459-467.
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(1987)
J. Carbohydr. Chem.
, vol.6
, pp. 459-467
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Csuk, R.1
Fürstner, A.2
Weidmann, H.3
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13
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0000544839
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Reaction of N-mono substituted 2-[(tributylstannyl)methyl]-propenamides with aldehydes in the presence of 4 equiv. of TiCl4 gave, after hydrolysis, α-methylene-γ-butyrolactones with ee's between 3.3-79%, cf. Tanaka, K.; Yoda, H.; Isobe, Y.; Kaji, A., J. Org. Chem. 1986, 51, 1856-1866.
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(1986)
J. Org. Chem.
, vol.51
, pp. 1856-1866
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Tanaka, K.1
Yoda, H.2
Isobe, Y.3
Kaji, A.4
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14
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33947443800
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Similary to the Gilman-Speeter reaction (Gilman, H.; Specter, M., J. Am. Chem. Soc. 1943, 65, 2255-2256) enantioselectivities between 95-100% have been obtained for the reaction of amino acid derived imines with organozinc reagents, cf. Dembele, Y. A.; Belaud, C.; Hitchock, P.; Villieras, J., Tetrahedron: Asymmetry 1992, 3, 351-354.
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(1943)
J. Am. Chem. Soc.
, vol.65
, pp. 2255-2256
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Gilman, H.1
Specter, M.2
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15
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0026562016
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Similary to the Gilman-Speeter reaction (Gilman, H.; Specter, M., J. Am. Chem. Soc. 1943, 65, 2255-2256) enantioselectivities between 95-100% have been obtained for the reaction of amino acid derived imines with organozinc reagents, cf. Dembele, Y. A.; Belaud, C.; Hitchock, P.; Villieras, J., Tetrahedron: Asymmetry 1992, 3, 351-354.
-
(1992)
Tetrahedron: Asymmetry
, vol.3
, pp. 351-354
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-
Dembele, Y.A.1
Belaud, C.2
Hitchock, P.3
Villieras, J.4
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16
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84981926374
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For Dreiding-Schmidt reactions: Öhler, E.; Reininger, K.; Schmidt, U., Angew. Chem., Int. Ed. Engl. 1970, 9, 457-458; Löffler, A.; Pratt, R. J.; Rüesch, H. P.; Dreiding, A. S., Helv. Chim. Acta 1970, 53, 383-403.
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(1970)
Angew. Chem., Int. Ed. Engl.
, vol.9
, pp. 457-458
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Öhler, E.1
Reininger, K.2
Schmidt, U.3
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17
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84979385936
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For Dreiding-Schmidt reactions: Öhler, E.; Reininger, K.; Schmidt, U., Angew. Chem., Int. Ed. Engl. 1970, 9, 457-458; Löffler, A.; Pratt, R. J.; Rüesch, H. P.; Dreiding, A. S., Helv. Chim. Acta 1970, 53, 383-403.
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(1970)
Helv. Chim. Acta
, vol.53
, pp. 383-403
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-
Löffler, A.1
Pratt, R.J.2
Rüesch, H.P.3
Dreiding, A.S.4
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18
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0030586205
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For a samarium iodide based approach: Csuk, R.; Höring, U.; Schaade, M., Tetrahedron 1996, 52, 9759-9776.
-
(1996)
Tetrahedron
, vol.52
, pp. 9759-9776
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Csuk, R.1
Höring, U.2
Schaade, M.3
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19
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37049105048
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Ameer, F.; Drewes, S. E.; Emslie, N. D.; Kaye, P. T.; Mann, R. L., J. Chem. Soc., Perkin Trans 1 1983, 2293-2295.
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(1983)
J. Chem. Soc., Perkin Trans 1
, pp. 2293-2295
-
-
Ameer, F.1
Drewes, S.E.2
Emslie, N.D.3
Kaye, P.T.4
Mann, R.L.5
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21
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0343534708
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note
-
MS spectra and elemental analysis revealed 25 to consist as a 60:40 mixture of 25 and 26 that could not be separated either by distillation or chromatography. The formation of 26 results from a bromine - chlorine substitution during the formation of the acid chloride. To avoid this side reaction attempts were undertaken to synthesize the correponding 2-bromometacrylic bromide by the reaction of 24 with oxalyl dibromide. These reactions, however, did not result in the formation of significant amounts of the desired product but huge deterioration took place.
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-
-
-
22
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0343098808
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-
note
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Under these conditions the product contains approx. 40% of 34 (cf. 16). In the following reactions only 28 gave the desired reactions very quickly but 34 was partially recovered.
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-
-
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23
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0343098807
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note
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Interestingly enough, neither a halogen exchange reaction occurs nor products resulting from a double addition reaction have been observed.
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-
-
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24
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15444370622
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and refs. cited therein
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Reiser, O., Nachr. Chem. Tech. Lab. 1996, 44, 612-618 and refs. cited therein.
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(1996)
Nachr. Chem. Tech. Lab.
, vol.44
, pp. 612-618
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Reiser, O.1
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25
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84986364562
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This seems to be due to a minimization of the dipole moments, cf. Oppolzer, W.; Chapuis, C.; Bernadinelli, G., Helv. Chim. Acta 1984, 67, 1397-1401 and Oppolzer, W.; Poli, G.; Kingma, A. J.; Starkemann, C.; Bernardinelli, G., Helv. Chim. Acta 1987, 70, 2201-2214.
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(1984)
Helv. Chim. Acta
, vol.67
, pp. 1397-1401
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-
Oppolzer, W.1
Chapuis, C.2
Bernadinelli, G.3
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26
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84928700723
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This seems to be due to a minimization of the dipole moments, cf. Oppolzer, W.; Chapuis, C.; Bernadinelli, G., Helv. Chim. Acta 1984, 67, 1397-1401 and Oppolzer, W.; Poli, G.; Kingma, A. J.; Starkemann, C.; Bernardinelli, G., Helv. Chim. Acta 1987, 70, 2201-2214.
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(1987)
Helv. Chim. Acta
, vol.70
, pp. 2201-2214
-
-
Oppolzer, W.1
Poli, G.2
Kingma, A.J.3
Starkemann, C.4
Bernardinelli, G.5
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27
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84986414675
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Oppolzer, W.; Rodriguez, I.; Blagg, J.; Bernardinelli, G., Helv. Chim. Acta 1989, 72, 123-130.
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(1989)
Helv. Chim. Acta
, vol.72
, pp. 123-130
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Oppolzer, W.1
Rodriguez, I.2
Blagg, J.3
Bernardinelli, G.4
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29
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0000107827
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Löffler, A.; Pratt, R. D.; Pucknat, J.; Gelbart, G.; Dreiding, A. S., Chimia 1969, 23, 413-416.
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(1969)
Chimia
, vol.23
, pp. 413-416
-
-
Löffler, A.1
Pratt, R.D.2
Pucknat, J.3
Gelbart, G.4
Dreiding, A.S.5
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