REFERENCES
- Lrcia Lopes , M. X. , Massayoshi , Yoshida and Otto Gottlieb , R. 1984 . Phytochemistry , 23 ( 11 ) : 2647
- Chohachi , Konno , Zhi-zhen , Lu Hui-Zhong , Xue . 1990 . J. Nat. prods , 53 ( 2 ) : 396
- King , F. E. and Wilson , J. G. 1964 . J. Chem. Soc. , : 4011
- Hearon , W. M. and Macgregor , W. S. 1955 . Chem. Revs. , 55 : 957
- Tesfaye , Biftu , Hazra , B. G. and Stevenson , R. 1979 . J. Chem. Soc. Perkin I , : 2276
- Schneiders , G. E. and Stevenson , R. 1981 . J. Org. Chem. , 46 : 2969
- Crossley , N. S. and Djerassi , C. 1962 . J. Chem. Soc. , : 1459
- Tesfaye , Biftu , Hazra , B. G. Stevenson , R. 1978 . J. Chem. Soc. Perkin I , : 1147
- Perry , C. W. , Kalnins , M. V. and Deitcher , K. H. 1972 . J. Org. Chem. , 37 ( 26 ) : 4371
- Michael Rathke , W. and Jeffrey , Deitch . 1971 . Tetrahedron Letters , 31 : 2953
- Shriner , R. L. , Schmidt , A. G. and Roll , L. J. 1943 . Organic Syntheses , 2 : 266
- Anxin , Wu , Yurui , Zhao and Xinfu , Pan . 1996 . Synth. Commun. , 26 ( 26 ) in press
- Sarma , D. N. and Sharma , R. P. 1985 . Tetrahedron Letters , 26 ( 21 ) : 2581
- Yun , He , Xinfu , Pan Zhao , He . 1989 . Synth. Commun. , 19 ( 17 ) : 3051
- Ashok , K. S. , Raman , K. B. and Corey , E. J. 1987 . J. Am. Chem. Soc. , 109 : 6187
- Whiting , D. A. 1987 . Nat. Prod. Reps. , : 489