cyclisation of (E)-2-methyl-3-oxo-5-phenylpent-4-en-2-ol and its p-methoxy-derivative in trifluoroacetic acid, together with the rates of the reverse reaction, indicates an influence of stereoelectronic origin which is not present in intermolecular Michael additions.
在
三氟乙酸中测量(E)-2-甲基-3-氧代-3-苯基-5-苯基戊-4-烯-2-醇及其对甲氧基衍
生物的环化速率,以及逆反应速率,表示在分子间迈克尔加成中不存在的立体电子起源的影响。