2,4-已二烯 、
2-methoxycarbonyl-1,4-naphthoquinone 在
(S,S,S,S)-bis(norephedrineoxazolinyl)pyridine*Gd(OTf)3 作用下,
以
四氢呋喃 、
甲苯 为溶剂,
生成 1,4-dimethyl-9,10-dioxo-1,9,9a,10-tetrahydro-4H-anthracene-4a-carboxylic acid methyl ester 、
1,4-dimethyl-9,10-dioxo-1,9,9a,10-tetrahydro-4H-anthracene-4a-carboxylic acid methyl ester