References
- Huffman , J. W. , Rao , C. B. S. and Kamiya , T. 1967 . J. Org. Chem. , 32 : 697
- Sengupta , P. 1953 . J. Org. Chem. , 18 : 249
- Huffman , J. W. and Shanmugasundaram , G. unpublished work. The analytical and spectral data for keto acid 1, its derivatives and the intermediates leading to it are in complete accord with the assigned structures. The use of sodium hydride, in the initial cyclization of triester 2 affords at best 57% yield of 3 for this step, while sodium with a trace of methanol gives 88%
- Schaefer , J. P. and Bloomfield , J. J. 1967 . Org. Reactions , 15 : 1 For a particularly elegant example see W. Meyer, A. P. Lobo, and E. T. Marquis, J. Org. Chem. 30, 183 (1965)