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51149117858
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All new compounds gave spectroscopic data and high-resolution mass spectrometric data consistent with their assigned structure
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All new compounds gave spectroscopic data and high-resolution mass spectrometric data consistent with their assigned structure.
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29
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51149105970
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Bis({4-methyl-1, 4-methylphenyl)sulfonyl]-3-pyrrolidinyl}methyl) phosphinic Acid (8a) A boiling solution of N,N-diallyl-4- methylbenzenesulfonamide (2a, 0.613 g, 2.439 mmol) and hypophosphorous acid (0.070 g, 1.061 mmol, in anhyd THF (5 mL) was treated with AIBN (4 x 0.087 g, 4 x 0.531 mmol) over 36 h. After cooling to r.t, brine (20 mL) was added and the mixture extracted with CH2Cl2 (3 x 20 mL, The combined layers were dried (MgSO4, concentrated (under reduced pressure, and column chromatography [SiO2, PE-EtOAc (4:6) to EtOAc-MeOH (1:1, gave phosphinic acid 8a (0.495 g, 82, as an inseparable mixture of isomers, with a cis/trans ratio of 2.2:1 (from the 1H NMR spectrum, white solid; mp 118-127°C. IR CH 2Cl2, νmax, 3541, 3058, 2964, 2882, 1598, 1479, 1454, 1406, 1384, 1337, 1160, 1093, 1044, 955 cm-1. cis-Diastereomers: 1
-
2: 567.1758; found: 567.1752.
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31
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0003100796
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Bittiger, H.14
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34
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51149105754
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2 (4.3 equiv) in degassed dioxane for 3 d, followed by esterification, gave a 4.7:1 mixture of 9 and 10, respectively, in a combined yield of only 34%.
-
2 (4.3 equiv) in degassed dioxane for 3 d, followed by esterification, gave a 4.7:1 mixture of 9 and 10, respectively, in a combined yield of only 34%.
-
-
-
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37
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0346159377
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(a) Cristau, H.-J.; Coulombeau, A.; Genevois-Borella, A.; Sanchez, F.; Pirat, J.-L. J. Organomet. Chem. 2002, 643-644, 381.
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51149085689
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-1, respectively. McGrady, J. E.; Pantazis, D. unpublished results.
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-1, respectively. McGrady, J. E.; Pantazis, D. unpublished results.
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42
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51149121499
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0-(3, 4-Methyl-1, 4-methylphenyl)sulfonyl]-3-pyrrolidinyl}methyl, phenyl)phosphorothioyl]oxy}propyl){4-methyl-1, 4-methylphenyl)sulfonyl, 3-pyrrolidinyl}methyl(phenyl)phosphinothioate (16a) A boiling solution of N,N-diallyl-4-methylbenzene sulfonamide (2a, 0.372 g, 1.479 mmol) and O-(3, phenyl(thioxo)phosphoranyl]oxy}propyl)phenylphosphinothioate (14, 0.264 g, 0.741 mmol) in anhyd THF (15 mL) was treated portionwise with AIBN (4 x 0.024 g, 4 x 0.148 mmol) over 36 h. After cooling to r.t, 1 M aq NaOH (20 mL) was added and the mixture extracted with CH2Cl 2 (3 x 15 mL, The combined organic layers were dried (MgSO 4, concentrated (under reduced pressure, and column chromatography [SiO2, CH2Cl2-EtOAc (97:3, gave bispyrrolidine 16a (0.477 g, 75, as an inseparable mixture of isomers, with a cis/trans ratio of 2.5:1 from the 1H NMR spectrum, white solid
-
4: 859.2256; found: 859.2264.
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43
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4444312609
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