References
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- Firouzabadi , H. , Mottaghinejad , E. and Seddighi , M. 1989 . Synthesis , : 378
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- Firouzabadi , H. , Seddighi , M. and Mottaghinejad , E. 1990 . Tetrahedron , 46 : 6869
- Quallich , G. J. and Lackey , J. W. 1990 . Tetrahedron Lett. , 31 : 3685 and the references cited therein