Cai, Hongyun; Khanal, Hari Datta; Lee, Yong Rok published the artcile< Base-Promoted Direct Cascade Transformation of Chromones to Coumarins via Benzannulation and Transesterification>, Electric Literature of 94-02-0, the main research area is alkenyl chromone acetoacetate cesium carbonate promoter tandem benzannulation transesterification; acyl phenylcoumarin preparation.
A mild base-promoted reaction between 3-substituted chromones and β-keto esters for the easy access to various coumarins with structural diversity was described. This protocol provided highly functionalized 3-acyl-4-arylcoumarins in good-to-excellent yield via benzannulation and transesterification. A reaction mechanism containing Michael addition, 1,5-H shift and intramol. transesterification was proposed.
Asian Journal of Organic Chemistry published new progress about Alkenes Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 94-02-0 belongs to class esters-buliding-blocks, and the molecular formula is C11H12O3, Electric Literature of 94-02-0.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics