乙酸酐 、
2-Amino-5-[(E)-2-(4-hydroxy-3-methoxy-phenyl)-vinyl]-7,7-dimethyl-6,7-dihydro-benzo[b]thiophene-3-carboxylic acid 在
肼 作用下,
生成 3-Amino-6-[(E)-2-(4-hydroxy-3-methoxy-phenyl)-vinyl]-2,8,8-trimethyl-7,8-dihydro-3H-benzo[4,5]thieno[2,3-d]pyrimidin-4-one