Synthesis of (1S*,2S*,3S*,4S*,5S*,6S*,7S*,8S*)-1,2,7,8- Tetrachlorotricyclo(4.2.0.03,8)octane-4,5-dicarboxylic Acid. Novel Entry into the C2-Bissecocubane System.
2010
Photocaging of the known Diels–Alder dimer of 2,3-dichlorocyclopentadienone, compound 1, followed by alkali-induced double ring-cleavage of the resulting caged diketone rac-2 or its dihydrate rac-3, led to the title tetrachloro dicarboxylic acid rac-5, thus affording a novel entry into the inherently chiral tricyclo[4.2.0.03,8]octane (C2-bissecocubane) system. Electrolysis of the disodium salt of rac-5 gave the tetrachloro alkene rac-14, from which other derivatives were obtained by standard methods.
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