6-Arylsalicylates were regioselectively prepared by formal [3+3] cyclization of 1,3-bis(silyloxy)-1,3-butadienes with 1-aryl-3-ethoxyprop-2-en-1-ones which are available by Heck reaction of benzoyl chlorides with ethylvinyl ether. In this context, the first [3+3] cyclizations of brominated substrates are reported.
通过
1,3-双(
硅氧基)-
1,3-丁二烯与1-芳基-3-乙
氧基丙-2-
烯-1-
酮的正式[3+3]环化反应,区域选择性地合成了6-芳基
水杨酸酯。而1-芳基-3-乙
氧基丙-2-
烯-1-
酮则可通过
苯甲酰氯与乙基
乙烯基醚的Heck反应获得。在这样的背景下,首次报道了
溴化底物的[3+3]环化反应。