O. Arjona et al., Enantioselective synthesis of (+)-5,6-exo-(isopropylidendioxy)2-phenylsulfonyl-7-oxabicyclo [2.2.1]hept-2-ene, TETRAHEDR-A, 10(11), 1999, pp. 2237-2242
The title compound (+)-1 has been synthesized in four steps from furan and
dienophile (+)-3 via an asymmetric Diels-Alder reaction. (C) 1999 Elsevier
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