3,4-dichloro-N-(4-methoxyphenyl)benzohydrazide hydrochloride 、
乙酰丙酸 在
氮气 、 ice water 作用下,
以
溶剂黄146 为溶剂,
反应 4.0h,
以to give [1-(3,4-dichlorobenzoyl)-5-methoxy-2-methyl-1H-indol-3-yl]acetic acid (49) (3.8 g, 95%) as a grey solid, mp 95-97° C.的产率得到[1-(3,4-dichlorobenzoyl)-5-methoxy-2-methylindol-3-yl]acetic acid