The exciton chirality method has been applied to the title compound (5) to establish the (1S5S,6R) absolute stereochemistry, which corroborates the (5S) configuration of (–)-spiro[4·4]nonane-1,6-dione (1).
N. Harada, N. Ochiai, K. Takada and H. Uda, J. Chem. Soc., Chem. Commun., 1977, 495 DOI: 10.1039/C39770000495
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