Benzylic and allylic alcohols are rendered electrophilic without chemical modification by the use of aluminium triflate as catalyst. The reaction succeeds with alcohol, thiol, carbon and nitrogen nucleophiles. When phenols are employed as nucleophiles, C-alkylation ensues. An advanced application of the method is demonstrated in the synthesis of 2H-chromenes and their N and S analogues.
通过使用
三氟甲磺酸铝作为催化剂,无需
化学改性即可将
苯甲酸和
烯丙醇亲电子化。该反应通过醇,
硫醇,碳和氮亲核试剂成功进行。当
苯酚用作亲核试剂时,随后发生C-烷基化。该方法的先进应用在2 H-色烯及其N和S类似物的合成中得到了证明。