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Mimouni, N.1
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For isomerization of β-alkyl-α-phosphonio- or phosphonovinyl anion into the corresponding allyl anion, see, for examples: (a) Minami, T.; Shikita, S.; So, S.; Nakayama, M.; Yamamoto, I. J. Org. Chem. 1988, 53, 2937.
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For the synthesis and synthetic application of phosphonoketene dithioacetals, see: Minami, T.; Okauchi, T.; Matsuki, H.; Nakamura, M.; Ichikawa, J.; Ishida, M. J. Org. Chem. 1996, 61, 8132.
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Ishida, M.6
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For the synthetic application of β-oxy- or β-thio-substituted vinylphosphonates, see: (a) Kouno, R.; Okauchi, T.; Nakamura, M.; Ichikawa, J.; Minami, T. J. Org. Chem. 1998, 63, 6239.
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(d) Palacios, F.; Ochoa de Retana, A. M.; Oyarzabal, J. Ibid. 1999, 55, 5947.
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4244058116
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EP 230944, 1987
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For biologically active phosphono-substituted heterocyclic compounds, see, for example: Seto, K.; Tanaka, S.; Sakoda, R.; Sakai, T.; Masuda, Y. EP 230944, 1987; Chem. Abstr. 1987, 107, 237009a.
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23
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0343367890
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-
note
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Only 1,2-adduct products were produced even in the presence of the Cu(I) salt.
-
-
-
-
24
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0017319308
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For acid-catalyzed conversion of (hydroxymethyl)vinyl ethers into unsaturated aldehydes, see: (a) Vlattas, I.; Vecchia, L. D.; Lee, A. O. J. Am. Chem. Soc. 1976, 98, 2008.
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Lee, A.O.3
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26
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0000628893
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and references therein
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The stereochemistry was determined on the basis of the phosphorus-vinyl proton coupling constant, see: Xu, Y.; Flavin, M. T.; Xu, Z.-Q. J. Org. Chem. 1996, 61, 7697 and references therein.
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Xu, Y.1
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27
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0028865696
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For the synthesis of limited α-formylvinylphosphonates such as 1-formyl-1-propenylphosphonate and 2-amino-1-(formyl)vinylphosphonate, see (a) Al-Badri, H.; About-Jaudet, E.; Combret, J.-C.; Collignon, N. Synthesis 1995, 1401.
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Al-Badri, H.1
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Collignon, N.4
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29
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0343367883
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-
note
-
1H NMR analysis (see Experimental Section).
-
-
-
-
30
-
-
0342498275
-
-
note
-
1H NMR, its isolation was not attempted.
-
-
-
-
31
-
-
0342498276
-
-
note
-
Diethyl 1-formylpentylphosphonate, which is hydrogenation product of 5k, was isolated in 37% yield along with 7k. The structure was identified by comparison of spectral data with those of an authentic sample.
-
-
-
-
32
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0002914396
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For intramolecular cycloadditions of 1,7-dienes with the carbonyl group on the C-1 carbon, see (a) Tietze, L, F.; Kiedrowski, G. v. Tetrahedron Lett. 1981, 22, 219.
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0028052246
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(b) Minami, T.; Utsunomiya, T.; Nakamura, S.; Okubo, M.; Kitamura, N.; Okada, Y.; Ichikawa, J. J. Org. Chem. 1994, 59, 6717 and references therein.
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Ichikawa, J.7
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34
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0342932450
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For hetero Diels-Alder reaction of α,β-unsaturated acylphosphonates with enol ethers, see, for example, Evans, D. A.; Johnson, J. S. J. Am. Chem. Soc. 1988, 110, 4895.
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(b) Baldwin, J. E.; Cutting, J.; Dupont, W.; Kruse, L. I. Silberman, L.; Thomas, R. C. Ibid 1976, 736.
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(c) Baldwin, J. E.; Thomas, R. C.; Cutting, J.; Dupont, W.; Kruse, L. I.; Silberman, L. J. Org. Chem. 1977, 42, 3846.
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38
-
-
0343803458
-
-
note
-
Although the compound 10 is composed of a single isomer, its stereochemical assignment was not made.
-
-
-
-
39
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-
0029948459
-
-
For the synthesis of fluorinated pyrazoles from the reaction of 2,2-difluorovinyl ketones with hydrazines, see: Ichikawa, J.; Kobayashi, M.; Noda, Y.; Yokota, N.; Amano, K.; Minami, T. J. Org. Chem. 1996, 61, 2763.
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32144461175
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For the synthesis of pyrazole from the reaction of α-oxo ketene dithioacetals with hydrazine, see, a review: Dieter, R. K. Tetrahedron 1986, 42, 3029. See also ref 15b.
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Dieter, R.K.1
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