A new preparation of ketenes for intramolecular cycloadditions involves a one-pot synthesis from the appropriate carboxylic acid to the ketene cycloaddition product. A tosylate leaving group rather than the conventional halide ion provides several advantages.
用于分子内环加成的烯酮的新制备涉及从合适的
羧酸到烯酮环加成产物的一锅合成。 与传统的卤化物离子相比,甲
苯磺酸盐离去基团具有多种优点。