(3aR,11bR,11cS)-2-methyl-9-tri(propan-2-yl)silyloxyspiro[3a,4,11b,11c-tetrahydrochromeno[4,3-e]isoindole-6,1'-cyclopentane]-1,3-dione 在
2,3-二氯-5,6-二氰基-1,4-苯醌 作用下,
以
苯 为溶剂,
以94.3%的产率得到2-Methyl-9-tri(propan-2-yl)silyloxyspiro[chromeno[4,3-e]isoindole-6,1'-cyclopentane]-1,3-dione