2,2′-[(2-methylenepropane-1,3-diyl)bis(oxy)]dibenzaldehyde 、
1-{2-[2-(2-Acetyl-4-methoxy-phenoxymethyl)-allyloxy]-5-methoxy-phenyl}-ethanone 在
potassium tert-butylate 作用下,
以
四氢呋喃 为溶剂,
反应 16.0h,
以28%的产率得到(3E,22E)-27,39-dimethoxy-13,33-dimethylidene-11,15,31,35-tetraoxapentacyclo[34.4.0.05,10.016,21.025,30]tetraconta-1(36),3,5,7,9,16,18,20,22,25(30),26,28,37,39-tetradecaene-2,24-dione