Synthesis of Podophyllum Lignans via an Isolable o-Quinonoid Pyrone
The 2-benzopyran-3-one 10 is a stable, isolable and useful Diels-Alder diene; its methyl 4-benzoyloxycrotonate adduct 23 formed regioselectively and stereoselectively in acetonitrile is reduced with H2/Pd to give 31 with inversion of C-1 stereochemistry.T
Jones, David W.,Thompson, Adrian M.
p. 2533 - 2540
(2007/10/02)
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