Synthesis of β-Substituted Chalcones from Phenones via Conjugated Nucleophilic Substitution of Propargylic Alcohols
摘要:
Phenones can be efficiently transformed into beta-substituted chalcones in a two-step process. First, propargylic alcohols were obtained by addition of ethoxyacetylene anion to aromatic ketones. Activation of the propargylic alcohols using a catalytic amount of acid in the presence of an electron-rich aromatic ketone affords the title enones in moderate to good yields.
Palladium-Catalyzed Chlorocarbonylation of C(sp<sup>2</sup>)-Triflates as a Route to Heteroarene C–H Functionalization and Ketone Synthesis
作者:Yi Liu、Bruce A. Arndtsen
DOI:10.1021/acs.organomet.2c00479
日期:2022.11.14
N-heterocycles to generate ketones using a Pd/Xantphos catalyst in concert with LiCl is described. Mechanisticstudies suggest the synergistic influence of the large-bite-angle phosphine on palladium with chloride allows the reductive elimination of a reactive acid chloride intermediate for subsequent reaction with heterocycles. Together, this offers a convergent approach to ketones with minimal waste from