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.