References
- House , H. H. 1972 . “Modern Synthetic Reactions” , 74 Menlo Park, California : W. A. Benjamin Inc. .
- Lyle , R. E. , Nelson , D. A. and Anderson , P. S. 1962 . Tetrahedron Lett. , : 533
- Ziering , A. , Berger , L. , Heineman , S. D. and Lee , J. 1947 . J. Org. Chem. , 12 : 894
- Casy , A. F. , Beckett , A. H. and Iorio , M. A. 1967 . Tetrahedron , 23 : 1405
- The X-ray structure of 9 was measured by Dr. Judith L. Flippen-Anderson at the Laboratory of the Structure of Matter, Naval Research Laboratory, Washington, D. C. 20375. Details will be published in Acta Cryst
- Available from Aldrich Chemical Co., Milwaukee, Wisconsin, USA
- Harrison , E. A. and Rice , K. C. 1980 . Heterocycles , 14 : 813