References
- Viswanathan , N. I. and Balakrishnan , V. 1979 . J. Chem. Soc., Perkin I , : 2361
- Rajappa , S. , Advani , B. G. and Sreenivasan , R. 1977 . Indian J. Chem. , 15B : 887
- Huang , Z.-T. and Wamhoff , H. 1984 . Chem. Ber. , 117 : 1856
- Huang , Z.-T. and Wamhoff , H. 1984 . Chem. Ber. , 117 : 1926
- Huang , Z.-T. and Tzai , L.-H. 1986 . Chem. Ber. , 119 : 2208
- Huang , Z.-T. and Liu , Z.-R. 1986 . Heterocycles , 24 : 2247
- Huang , Z.-T. and Wang , X.-J. 1987 . Chem. Ber. , 120 : 1803
- Huang , Z.-T. and Liu , Z.-R. in press . Synth. Commun. ,