Divergent Synthesis of Isochroman-4-ols, 1,3-Dihydroisobenzofurans, and Tetrahydro-2H-indeno[2,1-b]furan-2-ones via Epoxidation/Cyclization Strategy of (E)-(2-Stilbenyl/Styrenyl)methanols
作者:Poonsakdi Ploypradith、Jira Jongcharoenkamol、Kitsana Jancharoen、Paratchata Batsomboon、Somsak Ruchirawat
DOI:10.1055/s-0042-1751458
日期:2023.9
could be synthesized via an epoxidation/cyclization strategy. Indenes, readily accessible from the same starting materials, could undergo epoxidation/ring-opening/cyclization to provide tetrahydro-2H-indeno[2,1-b]furan-2-ones. Stilbene/styrene/indene epoxidation by m-CPBA or DMDO converted the nucleophilic olefin into the electrophilic epoxide, which subsequently underwent the regioselective ring-opening
从 ( E )-(2-茋基/苯乙烯基) 甲醇开始,可以通过环氧化/环化策略合成两种不同的支架,即 isochroman-4-ols 和 1,3-dihydroisobenzofurans (phthalans)。可以从相同的起始材料轻松获得茚,可以进行环氧化/开环/环化以提供四氢-2H-茚并[2,1- b ]呋喃-2-酮。二苯乙烯/苯乙烯/茚环氧化m-CPBA 或 DMDO 将亲核烯烃转化为亲电环氧化物,随后通过羟基或酯基进行区域选择性开环,从而在新形成的立体异构中心提供具有立体控制的相应产物。反应在底物控制下进行,以排他性地产生每种产物类型。