References
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- Brocksom , T. J. and Ferreira , J. T.B . 1981 . Synth. Commun. , 11 : 1005
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- Tadwalkar , V. R. and Rao , A. S. 1971 . Indian J. Chem. , 9 : 1416 We thank Prof. Rao for 1H NMR spectra
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- Hegde , S. G. , Beckwith , D. and Doti , R . 1985 . J. Org. Chem. , 50 : 894
- Ferraz , H. M.C. , Brocksom , T. J. , Pinto , A. C. and Abla , M. A. 1986 . Tetrahedron Letts. , 27 : 811
- dos Santos , R. B. unpublished results
- Jacobi , P. A. and Kaczmarek , C. S.R . 1984 . Tetrahedron Letts. , 25 : 4859