、
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,23S,26S)-11,17,32,38-tetraoxanonacyclo[37.3.1.16,10.118,22.127,31.02,7.05,42.021,26.023,28]hexatetraconta-1(42),3,6,8,10(46),18(45),19,21,24,27,29,31(44),39(43),40-tetradecaene-3,4,24,25-tetracarboxylate 、