Brønsted Acid Catalyzed Friedel–Crafts Alkylation Reactions of Trifluoromethyl-α,β-ynones with Indoles
作者:Shigeru Sasaki、Yuta Ikekame、Manabu Tanayama、Takayasu Yamauchi、Kimio Higashiyama
DOI:10.1055/s-0032-1317485
日期:——
Friedel–Crafts alkylation reaction between trifluoromethyl-α,β-ynones and indoles has been described. The reaction is catalyzed by benzoic acid (5 mol%), with the indoles adding to the carbonyl carbon of the trifluoromethyl-α,β-ynones producing the corresponding 1,2-addition products as trifluoromethyl propargyl alcohols in high yields. Furthermore, treatment of the product with indoles in the presence
已经描述了布朗斯台德酸催化的三氟甲基-α,β-炔酮和吲哚之间的 Friedel-Crafts 烷基化反应的成功开发。该反应由苯甲酸 (5 mol%) 催化,吲哚加成到三氟甲基-α,β-炔酮的羰基碳上,以高产率生成相应的 1,2-加成产物,如三氟甲基炔丙醇。此外,在三氟乙酸(10 mol%)存在下用吲哚处理产物以高产率得到三氟甲基官能化的不对称双(吲哚基)丙炔。