4-(4-decoxyphenyl)-2,3,3a,8b-tetrahydro-1H-cyclopenta[b]indole-7-carbaldehyde 、
3-羧甲基绕丹宁 在
ammonium acetate 、
溶剂黄146 作用下,
反应 0.5h,
以80.7%的产率得到2-[(5Z)-5-[[4-(4-decoxyphenyl)-2,3,3a,8b-tetrahydro-1H-cyclopenta[b]indol-7-yl]methylidene]-4-oxo-2-sulfanylidene-1,3-thiazolidin-3-yl]acetic acid