Silver-Catalyzed Cyclization of <i>ortho</i>-Carbonylarylacetylenols for the Synthesis of Dihydronaphthofurans
作者:Bhornrawin Akkachairin、Jumreang Tummatorn、Nantamon Supantanapong、Phongprapan Nimnual、Charnsak Thongsornkleeb、Somsak Ruchirawat
DOI:10.1021/acs.joc.7b00198
日期:2017.4.7
ortho-Carbonylarylacetylenols have been employed for the synthesis of dihydronaphthofurans via AgTFA-catalyzed annulation reaction. A broad range of substrates both ortho-keto- and ortho-formylarylacetylenols could be employed in this transformation providing the desired products in good yields. However, the reaction pathways of these two substrates are different. The reaction of the ketone precursors could directly
邻-羰基芳基乙酰基烯醇已被用于通过AgTFA催化的环化反应合成二氢萘呋喃。在该转化中可以使用邻-酮-和邻-甲酰基芳基乙酰基烯醇的各种各样的底物,以高收率提供所需的产物。但是,这两种底物的反应途径是不同的。酮前体的反应可在一次操作中直接产生所需的产物,而醛前体的反应则需要一锅两步的方法,而无需分离双环缩醛中间体。此外,该方法还以很高的产率成功地用于合成二氢萘并吡喃。