8-BromocorypallineのUllmann反応

抄録

As reported by Tomita, et al. the usual Ullmann reaction of potassium salt of 8-bromocorypalline (I) did not give dibenzo-p-dioxin derivative (IV) but afforded corypalline (II) and O-methylcorypalline (III). In this report, author carried out Ullmann reaction of I with potassium carbonate and copper powder in pyridine and examined the resulting products. In this case, besides II another non-phenolic base whose analytical values corresponded with IV was obtained and product III could not be detected. Since this product whose analytical values were consistent with IV showed negative dibenzo-p-dioxin reaction it would be V.