Annulation of β-naphthols and 4-hydroxycoumarins with vinylsulfonium salts: synthesis of dihydrofuran derivatives
作者:Zi-cong Chen、Lang Tong、Zhi-bo Du、Zhi-feng Mao、Xue-jing Zhang、Yong Zou、Ming Yan
DOI:10.1039/c8ob00293b
日期:——
A new synthetic approach to dihydrofuranderivatives via the annulation reaction of β-naphthols and 4-hydroxycoumarins with vinylsulfonium salts has been developed. A variety of dihydrofuranderivatives were prepared in moderate to good yields under mild conditions. The products could be readily transformed to the corresponding furans via the dehydrogenation with DDQ.
Palladium <scp>Iodide‐Catalyzed</scp> Selective Carbonylative Double Cyclization of 4‐(<scp>2‐Aminophenyl</scp>)‐3‐yn‐1‐ols to Dihydrofuroquinolinone Derivatives
作者:Raffaella Mancuso、Alex De Salvo、Patrizio Russo、Aurelia Falcicchio、Nicola Della Ca’、Leonardo Pantoja Munoz、Bartolo Gabriele
DOI:10.1002/cjoc.202300277
日期:2023.11
The PdI2/KI-catalyzed oxidative carbonylation of 4-(2-aminophenyl)-3-yn-1-ols, bearing two potential nucleophilic groups in suitable positionselectively leads to dihydrofuroquinolinone derivatives in fair to high yields (60%—89%) and excellent turnover numbers (180—267 mol of product per mol of Pd) over 19 examples, through a mechanistic pathway involving initial O-cyclization followed by N-cyclocarbonylation