The first iridium-catalyzed enantioselective vinylogous allylic alkylation of coumarins is presented. Using easily accessible linear allylic carbonates as the allylic electrophile, this reaction installs unfunctionalized allyl groups at the γ-position of 4-methylcoumarins in an exclusively branched-selective manner generally in high yields with an excellent level of enantioselectivity (up to 99 : 1 er).

中文翻译：

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香豆素的铱催化对映选择性直接乙烯基烯丙基烷基化† ‡

介绍了香豆素的第一个铱催化的对映选择性乙烯基烯丙基烷基化反应。使用容易获得的线性烯丙基碳酸酯作为烯丙基亲电子试剂，该反应通常以高收率和极好的对映选择性（高达99：1 er）以专有的支链选择性方式将未官能化的烯丙基安装在4-甲基香豆素的γ位上。 ）。