、
dimethyl 9,10-dihydro-2,6-dihydroxy-9,10-ethenoanthracene-11,12-dicarboxylate 在
caesium carbonate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 96.0h,
生成 tetramethyl (2R,5R,22S,25S)-11,16,31,36-tetraoxanonacyclo[35.3.1.16,10.117,21.126,30.02,7.05,40.020,25.022,27]tetratetraconta-1(40),3,6,8,10(44),17(43),18,20,23,26,28,30(42),37(41),38-tetradecaene-3,4,23,24-tetracarboxylate 、