Ni-Catalyzed Reductive C–O Bond Arylation of Oxalates Derived from α-Hydroxy Esters with Aryl Halides
摘要:
A Ni-catalyzed reductive cross-coupling of alpha-hydroxycarbonyl compounds modified with oxalyl groups and aryl halides has been developed that furnishes alpha-aryl esters under mild conditions and tolerates a variety of functionalized aryl halides bearing electron withdrawing and-donating groups. This work highlights C-O bond fragmentation on secondary alkyl carbon centers that generates alpha-carbonyl radicals.
A novel consecutive three-component Heck-isomerization-Wittig sequence by way of in situ generated aldehydes
作者:Jesco Panther、Adalbert Röhrich、Thomas J. J. Müller
DOI:10.3998/ark.5550190.0013.321
日期:——
A novelconsecutivethree-component four step synthesis of 5-(hetero)arylpent-2-enoates has been disclosed. Various (hetero)aryl iodides can be coupled with allyl alcohol under Heck conditions to give 3-(hetero)arylpropionaldehyde in termediates, which were transformed without isolation with in situgenerated stabilized phosphorus ylides to furnish 5-(hetero)arylpent-2enoates in moderate to excellent