重氮乙酸乙酯 、
(4-Methyl-3,3,6,9-tetraoxo-2,3,5,6,9,9b-hexahydro-1H-3λ6-naphtho[2,1-b]thiophen-8-ylsulfanyl)-acetic acid 以
苯 为溶剂,
反应 10.0h,
以75%的产率得到6,9-dihydroxy-3,3-dioxo-4-methyl-8-carboxymethylthio-7,8-(2-ethoxycarbonylcyclopropano)-1,2,7,8-tetrahydrothieno<3,2-a>naphthalene