-
1
-
-
0031010928
-
-
references cited therein
-
Kabalka, G. W.; Pagni, R. M. Tetrahedron 1997, 53, 7999; and references cited therein.
-
(1997)
Tetrahedron
, vol.53
, pp. 7999
-
-
Kabalka, G.W.1
Pagni, R.M.2
-
2
-
-
0000559096
-
-
Measurement of the acid strength: 0.5 g of zirconium sulfophenyl phosphonate, previously dried at 160 °C for 12 h, were dispersed in 3 mL of benzene in a test tube. Then, 0.2 mg of the chosen Hammet indicator were added to the dispersion held under stirring. The colour changes were evaluated after 30 min
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Measurement of the acid strength: 0.5 g of zirconium sulfophenyl phosphonate, previously dried at 160 °C for 12 h, were dispersed in 3 mL of benzene in a test tube. Then, 0.2 mg of the chosen Hammet indicator were added to the dispersion held under stirring. The colour changes were evaluated after 30 min. For more detailed information see: (a) Umansky, B.; Engelhardt, J.; Hall, W. K. J. Catal. 1991, 727, 128.
-
(1991)
J. Catal.
, vol.727
, pp. 128
-
-
Umansky, B.1
Engelhardt, J.2
Hall, W.K.3
-
4
-
-
1942421601
-
-
Curini, M.; Rosati, O.; Costantino, U. Curr. Org. Chem. 2004, 5, 591.
-
(2004)
Curr. Org. Chem.
, vol.5
, pp. 591
-
-
Curini, M.1
Rosati, O.2
Costantino, U.3
-
5
-
-
0033617421
-
-
(a) Kizer, D. E.; Miller, R. B.; Kurth, M. J. Tetrahedron Lett. 1999, 40, 3535.
-
(1999)
Tetrahedron Lett.
, vol.40
, pp. 3535
-
-
Kizer, D.E.1
Miller, R.B.2
Kurth, M.J.3
-
6
-
-
0029793541
-
-
(b) Kees, K. L.; Fitgzerald, S. J.; Steiner, K. E.; Mattes, J. F.; Mihan, B.; Tosi, T.; Montoro, D.; McCaleb, M. L. J. Med. Chem. 1996, 39, 3920.
-
(1996)
J. Med. Chem.
, vol.39
, pp. 3920
-
-
Kees, K.L.1
Fitgzerald, S.J.2
Steiner, K.E.3
Mattes, J.F.4
Mihan, B.5
Tosi, T.6
Montoro, D.7
McCaleb, M.L.8
-
8
-
-
84989726424
-
-
(d) Lyga, J. W.; Patera, R. M.; Plummer, M. J.; Hailing, B. P.; Yukas, D. A. Pest. Sci. 1994, 42, 29.
-
(1994)
Pest. Sci.
, vol.42
, pp. 29
-
-
Lyga, J.W.1
Patera, R.M.2
Plummer, M.J.3
Hailing, B.P.4
Yukas, D.A.5
-
9
-
-
84944033746
-
-
Katrizky, A. R.; Rees, C. W.; Scriven, E. F. V., Eds.; Pergamon Press: Oxford
-
(a) Elguero, J. In Comprehensive Heterocyclic Chemistry, Vol. 3; Katrizky, A. R.; Rees, C. W.; Scriven, E. F. V., Eds.; Pergamon Press: Oxford, 1996, 1-75.
-
(1996)
Comprehensive Heterocyclic Chemistry
, vol.3
, pp. 1-75
-
-
Elguero, J.1
-
10
-
-
0042530225
-
-
references cited therein
-
(b) Lee, K. Y.; Kim, J. M.; Kim, J. N. Tetrahedron Lett. 2003, 44, 6737; and references cited therein.
-
(2003)
Tetrahedron Lett.
, vol.44
, pp. 6737
-
-
Lee, K.Y.1
Kim, J.M.2
Kim, J.N.3
-
13
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28844448144
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-
note
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3): δ = 10.2, 20.4, 23.0 (double), 23.3,117.7,121.0,127.2,128.8, 135.7,138.3, 145.2, 145.6, 153.5. GCMS: m/z = 302, 285, 255, 209, 181, 135, 115.
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-
-
-
15
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0029050230
-
-
Zelenin, K. N.; Alekseyev, V. V.; Tygysheva, A. R.; Yakimovitch, S. I. Tetrahedron 1995, 57, 11251.
-
(1995)
Tetrahedron
, vol.57
, pp. 11251
-
-
Zelenin, K.N.1
Alekseyev, V.V.2
Tygysheva, A.R.3
Yakimovitch, S.I.4
-
16
-
-
0033229958
-
-
(a) Alberola, A.; Calvo, L.; Ortega, A. G.; Sádaba, M. L.; Sañudo, M. C.; Granda, S. G.; Rodríguez, E. G. Heterocycles 1999, 57, 2675.
-
(1999)
Heterocycles
, vol.57
, pp. 2675
-
-
Alberola, A.1
Calvo, L.2
Ortega, A.G.3
Sádaba, M.L.4
Sañudo, M.C.5
Granda, S.G.6
Rodríguez, E.G.7
-
17
-
-
0032480918
-
-
(b) Kashima, C.; Tsuruoka, S.; Mizuhara, S. Tetrahedron 1998, 54, 14679.
-
(1998)
Tetrahedron
, vol.54
, pp. 14679
-
-
Kashima, C.1
Tsuruoka, S.2
Mizuhara, S.3
-
19
-
-
84986502890
-
-
Elguero, J.; Martinez, A.; Singh, S. P.; Kumar, D. J. Heterocycl. Chem. 1991, 28, 647.
-
(1991)
J. Heterocycl. Chem.
, vol.28
, pp. 647
-
-
Elguero, J.1
Martinez, A.2
Singh, S.P.3
Kumar, D.4
-
20
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28844455915
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note
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2 and dried at 120 °C for 12 h can be reused for several experiments. The reaction of 2,3-hexanedione and phenylhydrazine has been repeated 3 times with the following yields: 82% (2 h), 84% (2 h), 79% (2 h).
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21
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0001500003
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Curini, M.; Rosati, O.; Pisani, E.; Costantino, U. Synlett 1996, 333.
-
(1996)
Synlett
, pp. 333
-
-
Curini, M.1
Rosati, O.2
Pisani, E.3
Costantino, U.4
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