References
- Singh , H. , Gandhi , C. S. and Bal , M. S. 1980 . Heterocycles , 14 : 3 Part I
- Meyers , A. I. 1974 . Heterocycles in Organic Synthesis , New York : Wiley .
- Singh , H. and Malhotra , S. U. in press . Indian J. Chem. ,
- Singh , H. , Lal , K. B. and Malhotra , S. C. 1979 . Indian J. Chem. , 173 : 4
- Singh , H. and Lal , K. B. 1972 . J. Chem. Soc. Perkin Trans. I , : 1799
- The multiplicity given in brackets pertains to the off-resonance proton decoupled spectrum
- Yellow coloured thick liquids