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Taber, Douglass F.; Gu, Peiming; Li, Rui. A Divergent Synthesis of the 13-9-Isofurans. Journal of Organic Chemistry (2009), 74(15), 5516-5522. Tr = trityl = Ph 3 C. TBAF = tert-butyldimethylammonium fluoride = (n-Bu) 4 N + F -. PNBA = para-nitrobenzoic acid
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Taber, Douglass F.; Gu, Peiming; Li, Rui. A Divergent Synthesis of the 13-9-Isofurans. Journal of Organic Chemistry (2009), 74(15), 5516-5522.
PNBA = para-nitrobenzoic acid DEAD = Diethyl Azodicarboxylate