W. H. Miles et al. / Tetrahedron 57 +2001) 9925±9929
9929
1247, 1164, 1119, 1068, 1009, 838 cm21
;
1H NMR
References
.300 MHz, CDCl3) d 7.41 .d, J8.7 Hz, 2H), 7.25±7.38
.m, 5H), 6.91 .d, J8.7 Hz, 2H), 5.84 .br s, 1H), 5.72 .dd,
J8.8, 4.3 Hz, 1H), 2.85 .dd, J14.6, 8.8 Hz, 1H), 2.78 .d,
J4.7 Hz, 3H), 2.64 .dd, J14.5, 4.3 Hz, 1H); 13C NMR
.100 MHz, CDCl3) d 169.9, 159.9, 139.9, 128.9, 128.2,
126.8 .q, JC±F3.8 Hz), 125.7, 124.3 .q, JC±F271.4 Hz),
123.2 .q, JC±F32.5 Hz), 116.0, 77.3, 45.9, 26.4. Anal.
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È
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Â
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Acknowledgements
We would like to thank the Petroleum Research Fund,
administered by the American Chemical Society, for
®nancial support and the Lafayette Committee on Academic
Research for support of E. J. F. in the form of a summer
stipend. We gratefully acknowledge a grant from the Kresge
Foundation for the purchase of the 400 MHz NMR.