Abstract Chlorosulfonyl isocyanata (CSI) reacts with 2H-azirines 1 a-c at -78°C to form [2+2+2] cycloadducts 3a-c and 4a-c. The tricyclic aziridine derivatives 4a-c undergo CSI extrusion reactions and subsequent oxidation to the corresponding pyrazines 5a-c. Structural identifications of 3a-c and 4a-c are based on ir, nmr and mass spectral data.
摘要
氯磺酰基
异氰酸酯 (CSI) 在 -78°C 下与
2H-氮丙啶 1 ac 反应形成 [2+2+2] 环加合物 3a-c 和 4a-c。
三环氮丙啶衍
生物 4a-c 经历 CSI 挤出反应并随后
氧化成相应的
吡嗪 5a-c。3a-c 和 4a-c 的结构鉴定基于 ir、nmr 和质谱数据。