ethyl 15-tert-butyl-17-methoxy-3,3,11,11-tetraoxo-3λ6,6,11λ6-trithiatricyclo[11.3.1.05,9]heptadeca-1(16),5(9),7,13(17),14-pentaene-7-carboxylate 480.0 ℃
、106.66 Pa
条件下,
以51%的产率得到ethyl 7-tert-butyl-9,10-dihydro-5-methyl-4H-benzo<4,5>cyclohepta<1,2-b>thiophene-2-carboxylate