Enantiocontrolled total syntheses of the breviones A, B, and C have been accomplished using a highly diastereoselective oxidative coupling of an α-pyrone with a tricyclic diene prepared from an optically pure Wieland-Miescher ketone derivative through the 7-endo-trig mode of acyl radical cyclization.

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Concise and Efficient Synthesis of 4-Hydroxy-2-pyrones from Pentane-2,4-diones. -The efficient, convenient, and practical synthesis is accomplished in two steps. -(YOSHIDA*, M.; TAKAI, H.; MITSUHASHI, C.; SHISHIDO*, K.; Heterocycles 82 (2010) 1, 881-886, http://dx.doi.org/10.3987/com-10-s(e)48 ; Grad. Sch. Pharm. Sci.,