6-oxo-6H-benzo[c]chromen-2-yl acetate;Lacton des 2-<2-Carboxy-phenyl>-hydrochinon-acetats;2-acetoxy-benzo[c]chromen-6-one;2-Acetoxy-benzo[c]chromen-6-on
Rh(<scp>iii</scp>)-Catalyzed sequential <i>ortho</i>-C–H oxidative arylation/cyclization of sulfoxonium ylides with quinones toward 2-hydroxy-dibenzo[<i>b,d</i>]pyran-6-ones
作者:Yaqun Dong、Jin-Tao Yu、Song Sun、Jiang Cheng
DOI:10.1039/d0cc00176g
日期:——
d ortho-C–H functionalization of sulfoxoniumylides followed by intramolecular annulation reactions with quinones was described, where the carbonyl in sulfoxoniumylides served as a chelation group. This protocol leads to the efficient formation of 2-hydroxy-6H-benzo[c]chromen-6-one derivatives, proceeding with the cleavage of the C(O)–S bond in sulfoxoniumylides. This protocol featured high chemo-selectivity
描述了铑(III)催化的亚砜基吡啶的邻位C-H官能化,然后与醌进行分子内环化反应,其中亚砜基吡啶中的羰基用作螯合基团。该方案导致2-羟基-6 H-苯并[ c ]铬n-6-one衍生物的有效形成,并进行了亚砜基磺酸盐中C(O)-S键的裂解。该协议具有高化学选择性和官能团耐受性的特点,其中亚硫酸sulf盐作为芳酰基源。