Ring Transformation of Fused Pyridazines. III. 1-Substituted Phthalazines with Ynamines.
作者:Ken-ichi IWAMOTO、Sumiko SUZUKI、Etsuo OISHI、Ken-ichi TANJI、Akira MIYASHITA、Takeo HIGASHINO
DOI:10.1248/cpb.43.679
日期:——
In the reaction of 1-substituted phthalazines with ynamines, there are three patterns of ring transformation, giving naphthalene derivatives through addition-cyclization-denitrogenation (type A), giving benzodiazocine derivatives through addition-cyclization-ring expansion (type B), and giving penta-substituted pyridine derivatives through N-N bond cleavage of the pyridazine ring (type C). In these reactions, it is considered that the substituent group at the 1-position of the phthalazine ring is a significant factor determining the outcome.
在1-取代酞嗪与亚胺的反应中,有三种环转化模式,通过加成-环化-脱氮反应生成萘衍生物(A型),通过加成-环化-环扩张反应生成苯并二氮杂环辛烷衍生物(B型),通过吡嗪环的N-N键断裂生成五取代吡啶衍生物(C型)。在这些反应中,酞嗪环1位上的取代基被认为是决定结果的重要因素。