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For V(II): (a) Inokuchi, T.; Kawafuchi, H.; Torii, S. J. Org. Chem. 1991, 56, 4983.
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33845556646
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For Li: (e) Pradham, S. K.; Kadam, S. R.; Kolhe, J. N.; Radhakrishinan, T. V.; Sohani, S. V.; Thaker, V. B. J. Org. Chem. 1981, 46, 2622.
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Thaker, V.B.6
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Trost, B. M.; Fleming, I., Eds; Pergamon Press: Oxford, Great Britain, Chapter 9
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(d) Molander, G. A. Comprehensive Organic Synthesis; Trost, B. M.; Fleming, I., Eds; Pergamon Press: Oxford, Great Britain, 1991; Vol. 1, Chapter 9, p 251.
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37
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0013579078
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Magnesium in methanol promotes reductive cyclization of ketones tethered to olefin substituted with electron withdrawing ester or nitrile group, however, it is uncertain that whether the reaction proceed through addition of ketyl to olefin or allyl anion to carbonyl group (see ref 8a)
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Magnesium in methanol promotes reductive cyclization of ketones tethered to olefin substituted with electron withdrawing ester or nitrile group, however, it is uncertain that whether the reaction proceed through addition of ketyl to olefin or allyl anion to carbonyl group (see ref 8a).
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38
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0013601797
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The structure and relative stereochemistry of It as well as other products were elucidated by 2-D COSY and 1-D NOE difference spectra
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The structure and relative stereochemistry of It as well as other products were elucidated by 2-D COSY and 1-D NOE difference spectra.
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40
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0024788923
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(b) Enholm, E. J.; Satici, H.; Trivellas, A. J. Org. Chem. 1989, 54, 5841.
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Enholm, E.J.1
Satici, H.2
Trivellas, A.3
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43
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0013628977
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note
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The starting ketone 5 was synthesized in 99% yield (ZIE; 1/1) by the reaction of ethyl 2-methylacetoacetate with 1.1 equiv 90% acrolein in diethyl ether at room temperature followed by Wittig reaction without further purification of the intermediate aldehyde.
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