4-methyl-benzo[b]thiophene-3-carbaldehyde 、
2-chloro-4-methyl-benzo[b]thiophene-3-carbaldehyde 以
甲苯 为溶剂,
以obtained in the previous step [Example 4-2] (1.00 g, 5.28 mmol based on theoretical 100% yield in previous step, i.e. 4-methyl-3H-benzo[b]thiophene-2-one) and toluene (5 mL)的产率得到4-methyl-3H-benzo[b]thiophene-2-one