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note
-
The amount of water as a solvent is a crucial factor for the catalytic activity of the reconstructed HT. The yield of 2 gradually decreased with increasing amount of water: 78% (1 mL), 70% (2 mL), and 25% (3 mL).
-
-
-
-
79
-
-
33746434991
-
-
note
-
In the 100 mmol scale aldol reaction of n-butyraldehyde using the reconstructed HT, the following reactivity of surfactants was observed: DTMAB (90) > sodium dodecyl sulfate (35) > Triton X 100 (13) > non (8). The values in parentheses are yields of 1,1-dimethoxy-2-ethyl-3-hexanol. Without the reconstructed HT catalyst, the aldolization did not occur even in the presence of DTMAB.
-
-
-
-
82
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0003417469
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Trost, B. M., Fleming, I., Eds.; Pergamon Press: Oxford
-
(b) Jung, M. E. In Comprehensive Organic Synthesis; Trost, B. M., Fleming, I., Eds.; Pergamon Press: Oxford, 1991; Vol. 4.
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(1991)
Comprehensive Organic Synthesis
, vol.4
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-
Jung, M.E.1
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87
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0038998967
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-
The Knoevenagel reaction of malononitrile with benzaldehyde without any catalyst in the presence of water has been reported. See: Bigi, F.; Conforti, M. L.; Maggi, R.; Piccinno, A.; Sartori, G. Green Chem. 2000, 2, 101. Under our reaction conditions, the reaction of malononitrile with benzaldehyde gave 82% of the corresponding product.
-
(2000)
Green Chem.
, vol.2
, pp. 101
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-
Bigi, F.1
Conforti, M.L.2
Maggi, R.3
Piccinno, A.4
Sartori, G.5
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88
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15844412400
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-
Murahashi, S.-I.; Naota, T.; Taki, H.; Mizuno, M.; Takaya, H.; Komiya, S.; Mizuho, Y.; Oyasato, N.; Hiraoka, M.; Hirano, M.; Fukuoka, A. J. Am. Chem. Soc. 1995, 117, 12436.
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(1995)
J. Am. Chem. Soc.
, vol.117
, pp. 12436
-
-
Murahashi, S.-I.1
Naota, T.2
Taki, H.3
Mizuno, M.4
Takaya, H.5
Komiya, S.6
Mizuho, Y.7
Oyasato, N.8
Hiraoka, M.9
Hirano, M.10
Fukuoka, A.11
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89
-
-
33746400673
-
-
note
-
An excess acceptor was used to avoid the Michael reaction.
-
-
-
-
90
-
-
33845469112
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-
Cabello, J. A.; Campelo, J. M.; Garcia, A.; Luna, D.; Marinas, J. M. J. Org. Chem. 1984, 49, 5195.
-
(1984)
J. Org. Chem.
, vol.49
, pp. 5195
-
-
Cabello, J.A.1
Campelo, J.M.2
Garcia, A.3
Luna, D.4
Marinas, J.M.5
-
91
-
-
33746445077
-
-
note
-
Ethyl cyanoacetate also reacted with 2-cyclohexen-1-one to afford the 1,4-addition product selectively. However, the yield of the Michael product was lower than 50%.
-
-
-
-
92
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-
0000009927
-
-
4) Boyer, J.; Corriu, R. J. P.; Reye, R. P. et C. Tetrahedron 1983, 39, 117.
-
(1983)
Tetrahedron
, vol.39
, pp. 117
-
-
Boyer, J.1
Corriu, R.J.P.2
Reye, R.P.3
-
93
-
-
0035898242
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-
(b) (NaOH/calix[n]arenes) Shimizu, S.; Shirakawa, S.; Suzuki, T.; Sasaki, Y. Tetrahedron 2001, 57, 6169.
-
(2001)
Tetrahedron
, vol.57
, pp. 6169
-
-
Shimizu, S.1
Shirakawa, S.2
Suzuki, T.3
Sasaki, Y.4
-
94
-
-
0005032017
-
-
Benzalacetone is formed by base-catalyzed condensation of 2,4-pentanedione with benzaldehyde followed by deacylation. See: Tsuboi, S.; Uno, T.; Takeda, A. Chem. Lett. 1978, 1325.
-
(1978)
Chem. Lett.
, pp. 1325
-
-
Tsuboi, S.1
Uno, T.2
Takeda, A.3
-
95
-
-
33746450937
-
-
note
-
- groups are indistinguishable. We think that the identical basicity of the HTs prepared by different methods may arise from the evacuation and/or exposure of the hydrated HTs to air before the condensation reaction.
-
-
-
-
96
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44049114869
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Corma, A.; Fornés, V.; Martín-Aranda, R. M.; Rey, F. J. Catal. 1992, 134, 58.
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(1992)
J. Catal.
, vol.134
, pp. 58
-
-
Corma, A.1
Fornés, V.2
Martín-Aranda, R.M.3
Rey, F.4
-
97
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33746408736
-
-
note
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2c
-
-
-
-
98
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0042523664
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-
Pasynkiewicz, S.; Starowieyski, K.; Rzepkowska, Z. J. Organomet. Chem. 1967, 10, 527.
-
(1967)
J. Organomet. Chem.
, vol.10
, pp. 527
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-
Pasynkiewicz, S.1
Starowieyski, K.2
Rzepkowska, Z.3
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