N-苯基马来酰亚胺 、
2-硫代水杨醛 在
Takemoto's catalyst 作用下,
以
xylene 为溶剂,
反应 7.0h,
生成 9-hydroxy-2-phenyl-9,9a-dihydro-3aH-4-thia-2-aza-cyclopenta[b]naphthalene-1,3-dione 、 9-hydroxy-2-phenyl-9,9a-dihydro-3aH-4-thia-2-aza-cyclopenta[b]naphthalene-1,3-dione 、
9-hydroxy-2-phenyl-9,9a-dihydro-3aH-4-thia-2-aza-cyclopenta[b]naphthalene-1,3-dione