نص أصلي - انجليزي - Catalytic enantioselective Diels–Alder reactions of furans

Chiral 7-oxabicyclo[2.2.1]hept-5-enes, 1 are attractive
precursors for the synthesis of various important natural
products such as pseudo-sugars,1 shikimic acid,2 transkumausyne,
3 and epoxyquinols.4