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Brønsted Acid Catalyzed Direct Annulation of Alkoxyallenes and Naphthols to Chroman Ketals
Synthesis ( IF 2.2 ) Pub Date : 2022-02-14 , DOI: 10.1055/s-0040-1719892 Cong Zhang 1 , Gaoxi Jiang 2 , Maosheng He 2, 3 , Jinlong Zhang 2 , Hao-Yang Wang 4
中文翻译：
布朗斯台德酸催化烷氧基丙二烯和萘酚直接环化生成铬曼缩酮
更新日期：2022-02-15
Synthesis ( IF 2.2 ) Pub Date : 2022-02-14 , DOI: 10.1055/s-0040-1719892 Cong Zhang 1 , Gaoxi Jiang 2 , Maosheng He 2, 3 , Jinlong Zhang 2 , Hao-Yang Wang 4
Affiliation
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A straightforward Brønsted acid-catalyzed and scalable annulation of alkoxyallenes with simple naphthols was developed, affording chroman ketals in 49–84% yields. The versatile chroman ketals can be easily converted into coumarins by 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ)-mediated oxidation, and a series of 2-substituted chromans via nucleophilic substitutions.
中文翻译：
布朗斯台德酸催化烷氧基丙二烯和萘酚直接环化生成铬曼缩酮
开发了一种简单的 Brønsted 酸催化和可扩展的烷氧基丙二烯与简单萘酚的环化反应，以 49-84% 的产率提供色满缩酮。多功能色满缩酮可以通过 2,3-二氯-5,6-二氰基-1,4-苯醌 (DDQ) 介导的氧化和一系列 2-取代色满通过亲核取代轻松转化为香豆素。
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