Cyclopentannulation reactions with organoiron reagents. Facile construction of functionalized hydroazulenes
作者:M. Rosenblum、J. C. Watkins
DOI:10.1021/ja00173a020
日期:1990.8
ketohydroazulene cycloadducts derived, in each reaction, from a single tautomeric tropyllium cation. The further reaction of two such cycloadducts with lithium dimethyl cuprate gave tricyclic ketones, through a sequence depicted as involving initial formation of an anionic acyliron complex, followed by migratory insertion and an intramolecular aldol condensation
通过用三甲基甲硅烷基或二正丁基硼三氟甲磺酸酯处理,将三羰基肌钙铁酮、2-甲基肌钙铁酮三羰基和 4-甲基肌钙铁酮三羰基转化为流动的三羰基肌钙铁酮盐。这些戊二烯基阳离子与 (η 1 -烯丙基)-、(η 1 -炔丙基)- 和 (η 1 -烯丙基) Fp 络合物 [Fp=C 5 H 5 Fe(CO) 2 ] 反应生成酮氢芴环加合物,在每个反应,来自单个互变异构的 tropyllium 阳离子。两个这样的环加合物与二甲基铜酸锂的进一步反应得到三环酮,其序列描述为最初形成阴离子酰基配合物,然后迁移插入和分子内醛醇缩合