General and Efficient Insertions of Carbons Carrying Aryl and Heteroaryl Groups: Synthesis of α-Aryl- and α-Heteroaryl-Substituted Ketones
作者:Alan R. Katritzky、Dorin Toader、Linghong Xie
DOI:10.1021/jo960841h
日期:1996.1.1
iazoles 1 with n-BuLi underwent addition to aliphatic and aromatic aldehydes and cyclic and acyclic ketones. Subsequent in situ thermal rearrangements of the intermediates in the presence of zinc bromide provided one-carbon chain-extended or ring-expanded alpha-aryl- and alpha-heteroaryl-substituted ketones 2 in moderate to excellent yields in simple one-pot operations with excellent regioselectivity
General and Efficient Carbon Insertion Route to One-Carbon-Homologated .alpha.-Aryl, .alpha.-Alkenyl, .alpha.-Alkoxy, and .alpha.-Phenylthio Alkyl Ketones
作者:Alan R. Katritzky、Linghong Xie、Dorin Toader、Larisa Serdyuk
DOI:10.1021/ja00153a032
日期:1995.12
α-Heteroarylation of Ketones <i>via</i> the Umpolung Reaction of <i>N</i>-Alkoxyenamine
A new method has been developed for the umpolung α-heteroarylation of ketones via an N-alkoxyenamine. The treatment of ketones with tris(heteroaryl)aluminum reagents in the presence of isoxazolidine gave the corresponding α-heteroarylated ketones in moderate to good yields.