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85036680932
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2; hexanes-ether) to give the title compound (1.73g; 76%) as a colorless oil.
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11
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85036679565
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note
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3).
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14
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84981574760
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and references cited therein
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N,N′-Dimethylpropyleneurea (DMPU) was employed as a substitute for the highly toxic HMPA commonly used for this reaction: see The Encyclopedia of Reagents in Organic Synthesis 1995, 2123-2127 (L. Paquette Ed.) and references cited therein. For the use of triethylphosphite in the coupling reaction, see: Alexakis, A.; Cahiez, G.; Normant, J. F. Synthesis 1979, 826-830.
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84981574760
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N,N′-Dimethylpropyleneurea (DMPU) was employed as a substitute for the highly toxic HMPA commonly used for this reaction: see The Encyclopedia of Reagents in Organic Synthesis 1995, 2123-2127 (L. Paquette Ed.) and references cited therein. For the use of triethylphosphite in the coupling reaction, see: Alexakis, A.; Cahiez, G.; Normant, J. F. Synthesis 1979, 826-830.
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3): Allinger, N. L.; Riew, C. K. J. Org. Chem. 1975, 40, 1316-1321. Gorthey, L. A.; Vairamani, M.; Djerassi, C. J. Org. Chem. 1985, 50, 4173-4182.
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22
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85036685166
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note
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3): 200.7 (4); 147.3 (3); 132.8 (3); 66.4 (3); 52.8 (2); 36.2 (2); 25.6 (2); 25.6 (1); 17.8 (4); -5.0 (1); -5.1 (1).
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