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33646465024
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Microwave-assisted Wittig reactions of aldehydes with stabilized phosphorus ylides, see:
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41
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0001104765
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Microwave-assisted Wittig reactions of ketones with stabilized phosphorus ylides, see:
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50
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The vinyl proton of 14 without specified stereochemistry was reported to appear at 6.00 (t, J=2 Hz) ppm, see:. Severin T., and Poehlmann H. Chem. Ber. 111 (1978) 1564-1577 Also, the (Z)-14 was reported to have the proton at 6.53 (t, J=2.4 Hz) ppm, which is very different from the value of 5.63 ppm given in Ref. 28a
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