Alkylation, Aldol, and Related Reactions of <i>O</i>-Alkanoyl- and 2-AlkenoylTEMPOs (2,2,6,6-Tetramethylpiperidine-<i>N</i>-oxyl): Insight into the Reactivity of Their Anionic Species in Comparison with Esters and Amides
作者:Tsutomu Inokuchi、Hiroyuki Kawafuchi
DOI:10.1021/jo0617316
日期:2007.2.1
The lithium anionic species generated from O-alkanoylTEMPOs upon treatment with LDA were first employed as a nucleophile for alkylation, Michael addition, direct aldol reaction, and others. The alkylation occurred smoothly at the methylene carbon, and no alkylation was found in the isobutyryl analogue, while silylation was scarcely attainable. Substitutions of the heteroatom were achieved by reaction