acid esters and (2-hydroxy-5-oxobicyclo [4.1.0] hept-3-en-3-yl) benzamide with TMSCl gave 7-membered ring compounds in good yields. The structure of the substituent at the C3 position of the cyclohexene ring is crucial for this ring expansion. The reaction mechanism is thought to involve the formation of a norcaradiene (bicyclo [4.1.0] hept-2,4-diene) structure and subsequent electrocyclic reaction.
(2-羟基-5-氧代双环[4.1.0]庚-3-烯-3-基)
氨基甲酸酯和(2-羟基-5-氧代双环[4.1.0]庚-3-烯-3的处理
氨基苯甲酰胺与TMSC1的收率很好,得到了7元环化合物。
环己烯环的C3位置的取代基结构对于该环的扩展至关重要。据认为,该反应机理涉及降正
丁二烯(双环[4.1.0]庚-2,4-二烯)结构的形成和随后的电环反应。