Organometallic reactions characteristic of chiral heterocyclic compounds: Synthesis and stereoselective grignard reaction of chiral 4-Oxa-7,7a-diazaperhydroindans.
作者:Hiroshi TAKAHASHI、Takashi SENDA、Kimio HIGASHIYAMA
DOI:10.1248/cpb.39.836
日期:——
New heterocyclic compounds, 6-phenyl-4-oxa-7, 7a-diazaperhydroindans (5 and 6), were synthesized by condensation of chiral 2-hydroxyethylhydrazines prepared from (R)-phenylglycinol with γ-chlorobutyraldehyde. The stereoselective Grignard reaction of 5 and 6 proceeded to give chiral 2-substituted 1-[N-(2-hydroxy-1-phenylethyl)amino] pyrrolidines(7a-d and 8a-d). The structures of these products were determined by comparison with authentic samples, and the reaction mechanism is proposed to involve an intermediate iminium salt.
由 (R)-phenylglycinol 制备的手性 2-羟乙基肼与γ-氯丁醛缩合合成了新的杂环化合物 6-苯基-4-氧杂-7, 7a-二氮杂吲哚(5 和 6)。通过 5 和 6 的立体选择性格氏反应,得到了手性 2-取代的 1-[N-(2-羟基-1-苯基乙基)氨基]吡咯烷(7a-d 和 8a-d)。通过与真实样品进行比较,确定了这些产物的结构,并提出了涉及中间亚氨基盐的反应机理。