Collective Syntheses of 2-(3-Methylbenzofuran-2-yl)phenol-Derived Natural Products by a Cascade [3,3]-Sigmatropic Rearrangement/Aromatization Strategy
作者:Yingzhan Tang、Chongguo Jiang、Xinhang Zhang、Chengjun Liu、Jingsheng Lin、Yanshi Wang、Chuan Du、Xiaoshi Peng、Wei Li、Yongxiang Liu、Maosheng Cheng
DOI:10.1021/acs.joc.7b02066
日期:2017.10.20
strategy to the synthesis of 2-(3-methylbenzofuran-2-yl)phenol derivatives was developed and applied to the collective syntheses of seven 2-arylbenzofuran-containing natural products, namely glycybenzofuran, glycyuralin E, lespedezol A1, puerariafuran, 7,2′,4′-trihydroxy-3-benzofurancarboxylic acid, coumestrol, and 4′-O-methylcoumestrol. Among them, the total syntheses of glycybenzofuran, glycyuralin
开发了一种级联[3,3]-σ重排/芳构化策略来合成2-(3-甲基苯并呋喃-2-基)苯酚衍生物,并将其应用于集体合成七个含2-芳基苯并呋喃的天然产物,即糖基苯并呋喃,甘油尿嘧啶E,来昔多酚A 1,葛根呋喃,7,2',4'-三羟基-3-苯并呋喃羧酸,香豆酚和4'- O-甲基香豆酚。其中,糖基苯并呋喃,糖尿素E,葛根素,7,2',4'-三羟基-3-苯并呋喃羧酸和4'- O的总合成-甲基香豆酚是首次报道。通过以克规模进行反应并通过在常见策略中用2-(3-甲基苯并呋喃-2-基)苯酚支架合成一系列天然产物,证明了该新颖策略在制备关键中间体中的实用性。