References
- Huang , Z. T. and Wamhoff , H. 1984 . Chem. Ber. , 117 : 622
- Rajappa , S. , Nair , M. D. , Sreenivasan , R. and Advani , B. G. 1982 . Tetrahedron , 38 : 1673
- Augustin , M. and Doelling , W. 1982 . J. Prekt. Chem. , 324 : 3
- Hirai , K. , Matsuda , H. and Kishda , Y. 1971 . Chem. Pharm. Bull. , 20 : 97
- Huang , Z. T. and Shi , X. 1990 . Synthesis , : 162
- Ruan , M. D. , Fan , W. Q. , Gu , Y. Z. , Jiang , H. J. and Bu , Y. F. 1991 . Synthetic Commun. , 21 : 1307
- Sandstron , J. and Wennerbeck , I. 1970 . Acta Chem. Scand. , 24 : 1191