The [3+3] cyclization of 1,3-bis(silyloxy)-1,3-butadienes with 1-hydroxy-5-silyloxy-4-en-3-ones afforded 6-(2-aryl-2-chloroethyl)salicylates, which were transformed into 3-aryl-3,4-dihydroisocoumarins by silica gel-mediated lactonization.
1,3-双(甲
硅烷氧基)-
1,3-丁二烯与1-羟基-5-甲
硅烷氧基-4-烯-3-酮的[3 + 3]环化反应得到6-(2-芳基-2-
氯乙基)
水杨酸酯,通过
硅胶介导的内酯化将其转化为3-芳基-3,4-二氢异
香豆素。